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Theorem List for Metamath Proof Explorer - 19801-19900   *Has distinct variable group(s)
TypeLabelDescription
Statement

Theorempsrridm 19801* The identity element of the ring of power series is a right identity. (Contributed by Mario Carneiro, 29-Dec-2014.) (Proof shortened by AV, 8-Jul-2019.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Ring)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   𝑈 = (𝑥𝐷 ↦ if(𝑥 = (𝐼 × {0}), 1 , 0 ))    &   𝐵 = (Base‘𝑆)    &    · = (.r𝑆)    &   (𝜑𝑋𝐵)       (𝜑 → (𝑋 · 𝑈) = 𝑋)

Theorempsrass1 19802* Associative identity for the ring of power series. (Contributed by Mario Carneiro, 5-Jan-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Ring)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    × = (.r𝑆)    &   𝐵 = (Base‘𝑆)    &   (𝜑𝑋𝐵)    &   (𝜑𝑌𝐵)    &   (𝜑𝑍𝐵)       (𝜑 → ((𝑋 × 𝑌) × 𝑍) = (𝑋 × (𝑌 × 𝑍)))

Theorempsrdi 19803* Distributive law for the ring of power series (left-distributivity). (Contributed by Mario Carneiro, 7-Jan-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Ring)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    × = (.r𝑆)    &   𝐵 = (Base‘𝑆)    &   (𝜑𝑋𝐵)    &   (𝜑𝑌𝐵)    &   (𝜑𝑍𝐵)    &    + = (+g𝑆)       (𝜑 → (𝑋 × (𝑌 + 𝑍)) = ((𝑋 × 𝑌) + (𝑋 × 𝑍)))

Theorempsrdir 19804* Distributive law for the ring of power series (right-distributivity). (Contributed by Mario Carneiro, 7-Jan-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Ring)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    × = (.r𝑆)    &   𝐵 = (Base‘𝑆)    &   (𝜑𝑋𝐵)    &   (𝜑𝑌𝐵)    &   (𝜑𝑍𝐵)    &    + = (+g𝑆)       (𝜑 → ((𝑋 + 𝑌) × 𝑍) = ((𝑋 × 𝑍) + (𝑌 × 𝑍)))

Theorempsrass23l 19805* Associative identity for the ring of power series. Part of psrass23 19807 which does not require the scalar ring to be commutative. (Contributed by Mario Carneiro, 7-Jan-2015.) (Revised by AV, 14-Aug-2019.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Ring)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    × = (.r𝑆)    &   𝐵 = (Base‘𝑆)    &   (𝜑𝑋𝐵)    &   (𝜑𝑌𝐵)    &   𝐾 = (Base‘𝑅)    &    · = ( ·𝑠𝑆)    &   (𝜑𝐴𝐾)       (𝜑 → ((𝐴 · 𝑋) × 𝑌) = (𝐴 · (𝑋 × 𝑌)))

Theorempsrcom 19806* Commutative law for the ring of power series. (Contributed by Mario Carneiro, 7-Jan-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Ring)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    × = (.r𝑆)    &   𝐵 = (Base‘𝑆)    &   (𝜑𝑋𝐵)    &   (𝜑𝑌𝐵)    &   (𝜑𝑅 ∈ CRing)       (𝜑 → (𝑋 × 𝑌) = (𝑌 × 𝑋))

Theorempsrass23 19807* Associative identities for the ring of power series. (Contributed by Mario Carneiro, 7-Jan-2015.) (Proof shortened by AV, 25-Nov-2019.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Ring)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    × = (.r𝑆)    &   𝐵 = (Base‘𝑆)    &   (𝜑𝑋𝐵)    &   (𝜑𝑌𝐵)    &   (𝜑𝑅 ∈ CRing)    &   𝐾 = (Base‘𝑅)    &    · = ( ·𝑠𝑆)    &   (𝜑𝐴𝐾)       (𝜑 → (((𝐴 · 𝑋) × 𝑌) = (𝐴 · (𝑋 × 𝑌)) ∧ (𝑋 × (𝐴 · 𝑌)) = (𝐴 · (𝑋 × 𝑌))))

Theorempsrring 19808 The ring of power series is a ring. (Contributed by Mario Carneiro, 29-Dec-2014.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Ring)       (𝜑𝑆 ∈ Ring)

Theorempsr1 19809* The identity element of the ring of power series. (Contributed by Mario Carneiro, 8-Jan-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Ring)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   𝑈 = (1r𝑆)       (𝜑𝑈 = (𝑥𝐷 ↦ if(𝑥 = (𝐼 × {0}), 1 , 0 )))

Theorempsrcrng 19810 The ring of power series is commutative ring. (Contributed by Mario Carneiro, 10-Jan-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ CRing)       (𝜑𝑆 ∈ CRing)

Theorempsrassa 19811 The ring of power series is an associative algebra. (Contributed by Mario Carneiro, 29-Dec-2014.)
𝑆 = (𝐼 mPwSer 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ CRing)       (𝜑𝑆 ∈ AssAlg)

Theoremresspsrbas 19812 A restricted power series algebra has the same base set. (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPwSer 𝐻)    &   𝐵 = (Base‘𝑈)    &   𝑃 = (𝑆s 𝐵)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))       (𝜑𝐵 = (Base‘𝑃))

Theoremresspsradd 19813 A restricted power series algebra has the same addition operation. (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPwSer 𝐻)    &   𝐵 = (Base‘𝑈)    &   𝑃 = (𝑆s 𝐵)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))       ((𝜑 ∧ (𝑋𝐵𝑌𝐵)) → (𝑋(+g𝑈)𝑌) = (𝑋(+g𝑃)𝑌))

Theoremresspsrmul 19814 A restricted power series algebra has the same multiplication operation. (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPwSer 𝐻)    &   𝐵 = (Base‘𝑈)    &   𝑃 = (𝑆s 𝐵)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))       ((𝜑 ∧ (𝑋𝐵𝑌𝐵)) → (𝑋(.r𝑈)𝑌) = (𝑋(.r𝑃)𝑌))

Theoremresspsrvsca 19815 A restricted power series algebra has the same scalar multiplication operation. (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPwSer 𝐻)    &   𝐵 = (Base‘𝑈)    &   𝑃 = (𝑆s 𝐵)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))       ((𝜑 ∧ (𝑋𝑇𝑌𝐵)) → (𝑋( ·𝑠𝑈)𝑌) = (𝑋( ·𝑠𝑃)𝑌))

Theoremsubrgpsr 19816 A subring of the base ring induces a subring of power series. (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPwSer 𝐻)    &   𝐵 = (Base‘𝑈)       ((𝐼𝑉𝑇 ∈ (SubRing‘𝑅)) → 𝐵 ∈ (SubRing‘𝑆))

Theoremmvrfval 19817* Value of the generating elements of the power series structure. (Contributed by Mario Carneiro, 7-Jan-2015.)
𝑉 = (𝐼 mVar 𝑅)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅𝑌)       (𝜑𝑉 = (𝑥𝐼 ↦ (𝑓𝐷 ↦ if(𝑓 = (𝑦𝐼 ↦ if(𝑦 = 𝑥, 1, 0)), 1 , 0 ))))

Theoremmvrval 19818* Value of the generating elements of the power series structure. (Contributed by Mario Carneiro, 7-Jan-2015.)
𝑉 = (𝐼 mVar 𝑅)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅𝑌)    &   (𝜑𝑋𝐼)       (𝜑 → (𝑉𝑋) = (𝑓𝐷 ↦ if(𝑓 = (𝑦𝐼 ↦ if(𝑦 = 𝑋, 1, 0)), 1 , 0 )))

Theoremmvrval2 19819* Value of the generating elements of the power series structure. (Contributed by Mario Carneiro, 7-Jan-2015.)
𝑉 = (𝐼 mVar 𝑅)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅𝑌)    &   (𝜑𝑋𝐼)    &   (𝜑𝐹𝐷)       (𝜑 → ((𝑉𝑋)‘𝐹) = if(𝐹 = (𝑦𝐼 ↦ if(𝑦 = 𝑋, 1, 0)), 1 , 0 ))

Theoremmvrid 19820* The 𝑋𝑖-th coefficient of the term 𝑋𝑖 is 1. (Contributed by Mario Carneiro, 7-Jan-2015.)
𝑉 = (𝐼 mVar 𝑅)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅𝑌)    &   (𝜑𝑋𝐼)       (𝜑 → ((𝑉𝑋)‘(𝑦𝐼 ↦ if(𝑦 = 𝑋, 1, 0))) = 1 )

Theoremmvrf 19821 The power series variable function is a function from the index set to elements of the power series structure representing 𝑋𝑖 for each 𝑖. (Contributed by Mario Carneiro, 29-Dec-2014.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑉 = (𝐼 mVar 𝑅)    &   𝐵 = (Base‘𝑆)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)       (𝜑𝑉:𝐼𝐵)

Theoremmvrf1 19822 The power series variable function is injective if the base ring is nonzero. (Contributed by Mario Carneiro, 29-Dec-2014.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑉 = (𝐼 mVar 𝑅)    &   𝐵 = (Base‘𝑆)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   (𝜑10 )       (𝜑𝑉:𝐼1-1𝐵)

Theoremmvrcl2 19823 A power series variable is an element of the base set. (Contributed by Mario Carneiro, 29-Dec-2014.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑉 = (𝐼 mVar 𝑅)    &   𝐵 = (Base‘𝑆)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝑋𝐼)       (𝜑 → (𝑉𝑋) ∈ 𝐵)

Theoremreldmmpl 19824 The multivariate polynomial constructor is a proper binary operator. (Contributed by Mario Carneiro, 21-Mar-2015.)
Rel dom mPoly

Theoremmplval 19825* Value of the set of multivariate polynomials. (Contributed by Mario Carneiro, 7-Jan-2015.) (Revised by Mario Carneiro, 2-Oct-2015.) (Revised by AV, 25-Jun-2019.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝑆 = (𝐼 mPwSer 𝑅)    &   𝐵 = (Base‘𝑆)    &    0 = (0g𝑅)    &   𝑈 = {𝑓𝐵𝑓 finSupp 0 }       𝑃 = (𝑆s 𝑈)

Theoremmplbas 19826* Base set of the set of multivariate polynomials. (Contributed by Mario Carneiro, 7-Jan-2015.) (Revised by Mario Carneiro, 2-Oct-2015.) (Revised by AV, 25-Jun-2019.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝑆 = (𝐼 mPwSer 𝑅)    &   𝐵 = (Base‘𝑆)    &    0 = (0g𝑅)    &   𝑈 = (Base‘𝑃)       𝑈 = {𝑓𝐵𝑓 finSupp 0 }

Theoremmplelbas 19827 Property of being a polynomial. (Contributed by Mario Carneiro, 7-Jan-2015.) (Revised by Mario Carneiro, 2-Oct-2015.) (Revised by AV, 25-Jun-2019.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝑆 = (𝐼 mPwSer 𝑅)    &   𝐵 = (Base‘𝑆)    &    0 = (0g𝑅)    &   𝑈 = (Base‘𝑃)       (𝑋𝑈 ↔ (𝑋𝐵𝑋 finSupp 0 ))

Theoremmplval2 19828 Self-referential expression for the set of multivariate polynomials. (Contributed by Mario Carneiro, 7-Jan-2015.) (Revised by Mario Carneiro, 2-Oct-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝑆 = (𝐼 mPwSer 𝑅)    &   𝑈 = (Base‘𝑃)       𝑃 = (𝑆s 𝑈)

Theoremmplbasss 19829 The set of polynomials is a subset of the set of power series. (Contributed by Mario Carneiro, 7-Jan-2015.) (Revised by Mario Carneiro, 2-Oct-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝑆 = (𝐼 mPwSer 𝑅)    &   𝑈 = (Base‘𝑃)    &   𝐵 = (Base‘𝑆)       𝑈𝐵

Theoremmplelf 19830* A polynomial is defined as a function on the coefficients. (Contributed by Mario Carneiro, 7-Jan-2015.) (Revised by Mario Carneiro, 2-Oct-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐾 = (Base‘𝑅)    &   𝐵 = (Base‘𝑃)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &   (𝜑𝑋𝐵)       (𝜑𝑋:𝐷𝐾)

Theoremmplsubglem 19831* If 𝐴 is an ideal of sets (a nonempty collection closed under subset and binary union) of the set 𝐷 of finite bags (the primary applications being 𝐴 = Fin and 𝐴 = 𝒫 𝐵 for some 𝐵), then the set of all power series whose coefficient functions are supported on an element of 𝐴 is a subgroup of the set of all power series. (Contributed by Mario Carneiro, 12-Jan-2015.) (Revised by AV, 16-Jul-2019.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝐵 = (Base‘𝑆)    &    0 = (0g𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &   (𝜑𝐼𝑊)    &   (𝜑 → ∅ ∈ 𝐴)    &   ((𝜑 ∧ (𝑥𝐴𝑦𝐴)) → (𝑥𝑦) ∈ 𝐴)    &   ((𝜑 ∧ (𝑥𝐴𝑦𝑥)) → 𝑦𝐴)    &   (𝜑𝑈 = {𝑔𝐵 ∣ (𝑔 supp 0 ) ∈ 𝐴})    &   (𝜑𝑅 ∈ Grp)       (𝜑𝑈 ∈ (SubGrp‘𝑆))

Theoremmpllsslem 19832* If 𝐴 is an ideal of subsets (a nonempty collection closed under subset and binary union) of the set 𝐷 of finite bags (the primary applications being 𝐴 = Fin and 𝐴 = 𝒫 𝐵 for some 𝐵), then the set of all power series whose coefficient functions are supported on an element of 𝐴 is a linear subspace of the set of all power series. (Contributed by Mario Carneiro, 12-Jan-2015.) (Revised by AV, 16-Jul-2019.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝐵 = (Base‘𝑆)    &    0 = (0g𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &   (𝜑𝐼𝑊)    &   (𝜑 → ∅ ∈ 𝐴)    &   ((𝜑 ∧ (𝑥𝐴𝑦𝐴)) → (𝑥𝑦) ∈ 𝐴)    &   ((𝜑 ∧ (𝑥𝐴𝑦𝑥)) → 𝑦𝐴)    &   (𝜑𝑈 = {𝑔𝐵 ∣ (𝑔 supp 0 ) ∈ 𝐴})    &   (𝜑𝑅 ∈ Ring)       (𝜑𝑈 ∈ (LSubSp‘𝑆))

Theoremmplsubglem2 19833* Lemma for mplsubg 19834 and mpllss 19835. (Contributed by AV, 16-Jul-2019.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑃 = (𝐼 mPoly 𝑅)    &   𝑈 = (Base‘𝑃)    &   (𝜑𝐼𝑊)       (𝜑𝑈 = {𝑔 ∈ (Base‘𝑆) ∣ (𝑔 supp (0g𝑅)) ∈ Fin})

Theoremmplsubg 19834 The set of polynomials is closed under addition, i.e. it is a subgroup of the set of power series. (Contributed by Mario Carneiro, 8-Jan-2015.) (Proof shortened by AV, 16-Jul-2019.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑃 = (𝐼 mPoly 𝑅)    &   𝑈 = (Base‘𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Grp)       (𝜑𝑈 ∈ (SubGrp‘𝑆))

Theoremmpllss 19835 The set of polynomials is closed under scalar multiplication, i.e. it is a linear subspace of the set of power series. (Contributed by Mario Carneiro, 7-Jan-2015.) (Proof shortened by AV, 16-Jul-2019.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑃 = (𝐼 mPoly 𝑅)    &   𝑈 = (Base‘𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)       (𝜑𝑈 ∈ (LSubSp‘𝑆))

Theoremmplsubrglem 19836* Lemma for mplsubrg 19837. (Contributed by Mario Carneiro, 9-Jan-2015.) (Revised by AV, 18-Jul-2019.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑃 = (𝐼 mPoly 𝑅)    &   𝑈 = (Base‘𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &   𝐴 = ( ∘𝑓 + “ ((𝑋 supp 0 ) × (𝑌 supp 0 )))    &    · = (.r𝑅)    &   (𝜑𝑋𝑈)    &   (𝜑𝑌𝑈)       (𝜑 → (𝑋(.r𝑆)𝑌) ∈ 𝑈)

Theoremmplsubrg 19837 The set of polynomials is closed under multiplication, i.e. it is a subring of the set of power series. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑃 = (𝐼 mPoly 𝑅)    &   𝑈 = (Base‘𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)       (𝜑𝑈 ∈ (SubRing‘𝑆))

Theoremmpl0 19838* The zero polynomial. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &   𝑂 = (0g𝑅)    &    0 = (0g𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Grp)       (𝜑0 = (𝐷 × {𝑂}))

Theoremmpladd 19839 The addition operation on multivariate polynomials. (Contributed by Mario Carneiro, 9-Jan-2015.) (Revised by Mario Carneiro, 2-Oct-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐵 = (Base‘𝑃)    &    + = (+g𝑅)    &    = (+g𝑃)    &   (𝜑𝑋𝐵)    &   (𝜑𝑌𝐵)       (𝜑 → (𝑋 𝑌) = (𝑋𝑓 + 𝑌))

Theoremmplmul 19840* The multiplication operation on multivariate polynomials. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐵 = (Base‘𝑃)    &    · = (.r𝑅)    &    = (.r𝑃)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &   (𝜑𝐹𝐵)    &   (𝜑𝐺𝐵)       (𝜑 → (𝐹 𝐺) = (𝑘𝐷 ↦ (𝑅 Σg (𝑥 ∈ {𝑦𝐷𝑦𝑟𝑘} ↦ ((𝐹𝑥) · (𝐺‘(𝑘𝑓𝑥)))))))

Theoremmpl1 19841* The identity element of the ring of polynomials. (Contributed by Mario Carneiro, 10-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   𝑈 = (1r𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)       (𝜑𝑈 = (𝑥𝐷 ↦ if(𝑥 = (𝐼 × {0}), 1 , 0 )))

Theoremmplsca 19842 The scalar field of a multivariate polynomial structure. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅𝑊)       (𝜑𝑅 = (Scalar‘𝑃))

Theoremmplvsca2 19843 The scalar multiplication operation on multivariate polynomials. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝑆 = (𝐼 mPwSer 𝑅)    &    · = ( ·𝑠𝑃)        · = ( ·𝑠𝑆)

Theoremmplvsca 19844* The scalar multiplication operation on multivariate polynomials. (Contributed by Mario Carneiro, 9-Jan-2015.) (Revised by Mario Carneiro, 2-Oct-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &    = ( ·𝑠𝑃)    &   𝐾 = (Base‘𝑅)    &   𝐵 = (Base‘𝑃)    &    · = (.r𝑅)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &   (𝜑𝑋𝐾)    &   (𝜑𝐹𝐵)       (𝜑 → (𝑋 𝐹) = ((𝐷 × {𝑋}) ∘𝑓 · 𝐹))

Theoremmplvscaval 19845* The scalar multiplication operation on multivariate polynomials. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &    = ( ·𝑠𝑃)    &   𝐾 = (Base‘𝑅)    &   𝐵 = (Base‘𝑃)    &    · = (.r𝑅)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &   (𝜑𝑋𝐾)    &   (𝜑𝐹𝐵)    &   (𝜑𝑌𝐷)       (𝜑 → ((𝑋 𝐹)‘𝑌) = (𝑋 · (𝐹𝑌)))

Theoremmvrcl 19846 A power series variable is a polynomial. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝑉 = (𝐼 mVar 𝑅)    &   𝐵 = (Base‘𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝑋𝐼)       (𝜑 → (𝑉𝑋) ∈ 𝐵)

Theoremmplgrp 19847 The polynomial ring is a group. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)       ((𝐼𝑉𝑅 ∈ Grp) → 𝑃 ∈ Grp)

Theoremmpllmod 19848 The polynomial ring is a left module. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)       ((𝐼𝑉𝑅 ∈ Ring) → 𝑃 ∈ LMod)

Theoremmplring 19849 The polynomial ring is a ring. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)       ((𝐼𝑉𝑅 ∈ Ring) → 𝑃 ∈ Ring)

Theoremmplcrng 19850 The polynomial ring is a commutative ring. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)       ((𝐼𝑉𝑅 ∈ CRing) → 𝑃 ∈ CRing)

Theoremmplassa 19851 The polynomial ring is an associative algebra. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)       ((𝐼𝑉𝑅 ∈ CRing) → 𝑃 ∈ AssAlg)

Theoremressmplbas2 19852 The base set of a restricted polynomial algebra consists of power series in the subring which are also polynomials (in the parent ring). (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPoly 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPoly 𝐻)    &   𝐵 = (Base‘𝑈)    &   (𝜑𝐼𝑉)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))    &   𝑊 = (𝐼 mPwSer 𝐻)    &   𝐶 = (Base‘𝑊)    &   𝐾 = (Base‘𝑆)       (𝜑𝐵 = (𝐶𝐾))

Theoremressmplbas 19853 A restricted polynomial algebra has the same base set. (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPoly 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPoly 𝐻)    &   𝐵 = (Base‘𝑈)    &   (𝜑𝐼𝑉)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))    &   𝑃 = (𝑆s 𝐵)       (𝜑𝐵 = (Base‘𝑃))

Theoremressmpladd 19854 A restricted polynomial algebra has the same addition operation. (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPoly 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPoly 𝐻)    &   𝐵 = (Base‘𝑈)    &   (𝜑𝐼𝑉)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))    &   𝑃 = (𝑆s 𝐵)       ((𝜑 ∧ (𝑋𝐵𝑌𝐵)) → (𝑋(+g𝑈)𝑌) = (𝑋(+g𝑃)𝑌))

Theoremressmplmul 19855 A restricted polynomial algebra has the same multiplication operation. (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPoly 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPoly 𝐻)    &   𝐵 = (Base‘𝑈)    &   (𝜑𝐼𝑉)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))    &   𝑃 = (𝑆s 𝐵)       ((𝜑 ∧ (𝑋𝐵𝑌𝐵)) → (𝑋(.r𝑈)𝑌) = (𝑋(.r𝑃)𝑌))

Theoremressmplvsca 19856 A restricted power series algebra has the same scalar multiplication operation. (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPoly 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPoly 𝐻)    &   𝐵 = (Base‘𝑈)    &   (𝜑𝐼𝑉)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))    &   𝑃 = (𝑆s 𝐵)       ((𝜑 ∧ (𝑋𝑇𝑌𝐵)) → (𝑋( ·𝑠𝑈)𝑌) = (𝑋( ·𝑠𝑃)𝑌))

Theoremsubrgmpl 19857 A subring of the base ring induces a subring of polynomials. (Contributed by Mario Carneiro, 3-Jul-2015.)
𝑆 = (𝐼 mPoly 𝑅)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPoly 𝐻)    &   𝐵 = (Base‘𝑈)       ((𝐼𝑉𝑇 ∈ (SubRing‘𝑅)) → 𝐵 ∈ (SubRing‘𝑆))

Theoremsubrgmvr 19858 The variables in a subring polynomial algebra are the same as the original ring. (Contributed by Mario Carneiro, 4-Jul-2015.)
𝑉 = (𝐼 mVar 𝑅)    &   (𝜑𝐼𝑊)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))    &   𝐻 = (𝑅s 𝑇)       (𝜑𝑉 = (𝐼 mVar 𝐻))

Theoremsubrgmvrf 19859 The variables in a polynomial algebra are contained in every subring algebra. (Contributed by Mario Carneiro, 4-Jul-2015.)
𝑉 = (𝐼 mVar 𝑅)    &   (𝜑𝐼𝑊)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPoly 𝐻)    &   𝐵 = (Base‘𝑈)       (𝜑𝑉:𝐼𝐵)

Theoremmplmon 19860* A monomial is a polynomial. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐵 = (Base‘𝑃)    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝑋𝐷)       (𝜑 → (𝑦𝐷 ↦ if(𝑦 = 𝑋, 1 , 0 )) ∈ 𝐵)

Theoremmplmonmul 19861* The product of two monomials adds the exponent vectors together. For example, the product of (𝑥↑2)(𝑦↑2) with (𝑦↑1)(𝑧↑3) is (𝑥↑2)(𝑦↑3)(𝑧↑3), where the exponent vectors ⟨2, 2, 0⟩ and ⟨0, 1, 3⟩ are added to give ⟨2, 3, 3⟩. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐵 = (Base‘𝑃)    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝑋𝐷)    &    · = (.r𝑃)    &   (𝜑𝑌𝐷)       (𝜑 → ((𝑦𝐷 ↦ if(𝑦 = 𝑋, 1 , 0 )) · (𝑦𝐷 ↦ if(𝑦 = 𝑌, 1 , 0 ))) = (𝑦𝐷 ↦ if(𝑦 = (𝑋𝑓 + 𝑌), 1 , 0 )))

Theoremmplcoe1 19862* Decompose a polynomial into a finite sum of monomials. (Contributed by Mario Carneiro, 9-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   (𝜑𝐼𝑊)    &   𝐵 = (Base‘𝑃)    &    · = ( ·𝑠𝑃)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝑋𝐵)       (𝜑𝑋 = (𝑃 Σg (𝑘𝐷 ↦ ((𝑋𝑘) · (𝑦𝐷 ↦ if(𝑦 = 𝑘, 1 , 0 ))))))

Theoremmplcoe3 19863* Decompose a monomial in one variable into a power of a variable. (Contributed by Mario Carneiro, 7-Jan-2015.) (Proof shortened by AV, 18-Jul-2019.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   (𝜑𝐼𝑊)    &   𝐺 = (mulGrp‘𝑃)    &    = (.g𝐺)    &   𝑉 = (𝐼 mVar 𝑅)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝑋𝐼)    &   (𝜑𝑁 ∈ ℕ0)       (𝜑 → (𝑦𝐷 ↦ if(𝑦 = (𝑘𝐼 ↦ if(𝑘 = 𝑋, 𝑁, 0)), 1 , 0 )) = (𝑁 (𝑉𝑋)))

Theoremmplcoe5lem 19864* Lemma for mplcoe4 19899. (Contributed by AV, 7-Oct-2019.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   (𝜑𝐼𝑊)    &   𝐺 = (mulGrp‘𝑃)    &    = (.g𝐺)    &   𝑉 = (𝐼 mVar 𝑅)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝑌𝐷)    &   (𝜑 → ∀𝑥𝐼𝑦𝐼 ((𝑉𝑦)(+g𝐺)(𝑉𝑥)) = ((𝑉𝑥)(+g𝐺)(𝑉𝑦)))    &   (𝜑𝑆𝐼)       (𝜑 → ran (𝑘𝑆 ↦ ((𝑌𝑘) (𝑉𝑘))) ⊆ ((Cntz‘𝐺)‘ran (𝑘𝑆 ↦ ((𝑌𝑘) (𝑉𝑘)))))

Theoremmplcoe5 19865* Decompose a monomial into a finite product of powers of variables. Instead of assuming that 𝑅 is a commutative ring (as in mplcoe2 19866), it is sufficient that 𝑅 is a ring and all the variables of the multivariate polynomial commute. (Contributed by AV, 7-Oct-2019.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   (𝜑𝐼𝑊)    &   𝐺 = (mulGrp‘𝑃)    &    = (.g𝐺)    &   𝑉 = (𝐼 mVar 𝑅)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝑌𝐷)    &   (𝜑 → ∀𝑥𝐼𝑦𝐼 ((𝑉𝑦)(+g𝐺)(𝑉𝑥)) = ((𝑉𝑥)(+g𝐺)(𝑉𝑦)))       (𝜑 → (𝑦𝐷 ↦ if(𝑦 = 𝑌, 1 , 0 )) = (𝐺 Σg (𝑘𝐼 ↦ ((𝑌𝑘) (𝑉𝑘)))))

Theoremmplcoe2 19866* Decompose a monomial into a finite product of powers of variables. (The assumption that 𝑅 is a commutative ring is not strictly necessary, because the submonoid of monomials is in the center of the multiplicative monoid of polynomials, but it simplifies the proof.) (Contributed by Mario Carneiro, 10-Jan-2015.) (Proof shortened by AV, 18-Oct-2019.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &    1 = (1r𝑅)    &   (𝜑𝐼𝑊)    &   𝐺 = (mulGrp‘𝑃)    &    = (.g𝐺)    &   𝑉 = (𝐼 mVar 𝑅)    &   (𝜑𝑅 ∈ CRing)    &   (𝜑𝑌𝐷)       (𝜑 → (𝑦𝐷 ↦ if(𝑦 = 𝑌, 1 , 0 )) = (𝐺 Σg (𝑘𝐼 ↦ ((𝑌𝑘) (𝑉𝑘)))))

Theoremmplbas2 19867 An alternative expression for the set of polynomials, as the smallest subalgebra of the set of power series that contains all the variable generators. (Contributed by Mario Carneiro, 10-Jan-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝑆 = (𝐼 mPwSer 𝑅)    &   𝑉 = (𝐼 mVar 𝑅)    &   𝐴 = (AlgSpan‘𝑆)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ CRing)       (𝜑 → (𝐴‘ran 𝑉) = (Base‘𝑃))

Theoremltbval 19868* Value of the well-order on finite bags. (Contributed by Mario Carneiro, 8-Feb-2015.)
𝐶 = (𝑇 <bag 𝐼)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &   (𝜑𝐼𝑉)    &   (𝜑𝑇𝑊)       (𝜑𝐶 = {⟨𝑥, 𝑦⟩ ∣ ({𝑥, 𝑦} ⊆ 𝐷 ∧ ∃𝑧𝐼 ((𝑥𝑧) < (𝑦𝑧) ∧ ∀𝑤𝐼 (𝑧𝑇𝑤 → (𝑥𝑤) = (𝑦𝑤))))})

Theoremltbwe 19869* The finite bag order is a well-order, given a well-order of the index set. (Contributed by Mario Carneiro, 2-Jun-2015.)
𝐶 = (𝑇 <bag 𝐼)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &   (𝜑𝐼𝑉)    &   (𝜑𝑇𝑊)    &   (𝜑𝑇 We 𝐼)       (𝜑𝐶 We 𝐷)

Theoremreldmopsr 19870 Lemma for ordered power series. (Contributed by Stefan O'Rear, 2-Oct-2015.)
Rel dom ordPwSer

Theoremopsrval 19871* The value of the "ordered power series" function. This is the same as mPwSer psrval 19759, but with the addition of a well-order on 𝐼 we can turn a strict order on 𝑅 into a strict order on the power series structure. (Contributed by Mario Carneiro, 8-Feb-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   𝐵 = (Base‘𝑆)    &    < = (lt‘𝑅)    &   𝐶 = (𝑇 <bag 𝐼)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &    = {⟨𝑥, 𝑦⟩ ∣ ({𝑥, 𝑦} ⊆ 𝐵 ∧ (∃𝑧𝐷 ((𝑥𝑧) < (𝑦𝑧) ∧ ∀𝑤𝐷 (𝑤𝐶𝑧 → (𝑥𝑤) = (𝑦𝑤))) ∨ 𝑥 = 𝑦))}    &   (𝜑𝐼𝑉)    &   (𝜑𝑅𝑊)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))       (𝜑𝑂 = (𝑆 sSet ⟨(le‘ndx), ⟩))

Theoremopsrle 19872* An alternative expression for the set of polynomials, as the smallest subalgebra of the set of power series that contains all the variable generators. (Contributed by Mario Carneiro, 8-Feb-2015.) (Revised by Mario Carneiro, 2-Oct-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   𝐵 = (Base‘𝑆)    &    < = (lt‘𝑅)    &   𝐶 = (𝑇 <bag 𝐼)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &    = (le‘𝑂)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))       (𝜑 = {⟨𝑥, 𝑦⟩ ∣ ({𝑥, 𝑦} ⊆ 𝐵 ∧ (∃𝑧𝐷 ((𝑥𝑧) < (𝑦𝑧) ∧ ∀𝑤𝐷 (𝑤𝐶𝑧 → (𝑥𝑤) = (𝑦𝑤))) ∨ 𝑥 = 𝑦))})

Theoremopsrval2 19873 Self-referential expression for the ordered power series structure. (Contributed by Mario Carneiro, 8-Feb-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &    = (le‘𝑂)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅𝑊)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))       (𝜑𝑂 = (𝑆 sSet ⟨(le‘ndx), ⟩))

Theoremopsrbaslem 19874 Get a component of the ordered power series structure. (Contributed by Mario Carneiro, 8-Feb-2015.) (Revised by Mario Carneiro, 2-Oct-2015.) (Revised by AV, 9-Sep-2021.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))    &   𝐸 = Slot 𝑁    &   𝑁 ∈ ℕ    &   𝑁 < 10       (𝜑 → (𝐸𝑆) = (𝐸𝑂))

Theoremopsrbas 19875 The base set of the ordered power series structure. (Contributed by Mario Carneiro, 8-Feb-2015.) (Revised by Mario Carneiro, 30-Aug-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))       (𝜑 → (Base‘𝑆) = (Base‘𝑂))

Theoremopsrplusg 19876 The addition operation of the ordered power series structure. (Contributed by Mario Carneiro, 8-Feb-2015.) (Revised by Mario Carneiro, 30-Aug-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))       (𝜑 → (+g𝑆) = (+g𝑂))

Theoremopsrmulr 19877 The multiplication operation of the ordered power series structure. (Contributed by Mario Carneiro, 8-Feb-2015.) (Revised by Mario Carneiro, 30-Aug-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))       (𝜑 → (.r𝑆) = (.r𝑂))

Theoremopsrvsca 19878 The scalar product operation of the ordered power series structure. (Contributed by Mario Carneiro, 8-Feb-2015.) (Revised by Mario Carneiro, 30-Aug-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))       (𝜑 → ( ·𝑠𝑆) = ( ·𝑠𝑂))

Theoremopsrsca 19879 The scalar ring of the ordered power series structure. (Contributed by Mario Carneiro, 8-Feb-2015.) (Revised by Mario Carneiro, 30-Aug-2015.)
𝑆 = (𝐼 mPwSer 𝑅)    &   𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))    &   (𝜑𝐼𝑉)    &   (𝜑𝑅𝑊)       (𝜑𝑅 = (Scalar‘𝑂))

Theoremopsrtoslem1 19880* Lemma for opsrtos 19882. (Contributed by Mario Carneiro, 8-Feb-2015.)
𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Toset)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))    &   (𝜑𝑇 We 𝐼)    &   𝑆 = (𝐼 mPwSer 𝑅)    &   𝐵 = (Base‘𝑆)    &    < = (lt‘𝑅)    &   𝐶 = (𝑇 <bag 𝐼)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &   (𝜓 ↔ ∃𝑧𝐷 ((𝑥𝑧) < (𝑦𝑧) ∧ ∀𝑤𝐷 (𝑤𝐶𝑧 → (𝑥𝑤) = (𝑦𝑤))))    &    = (le‘𝑂)       (𝜑 = (({⟨𝑥, 𝑦⟩ ∣ 𝜓} ∩ (𝐵 × 𝐵)) ∪ ( I ↾ 𝐵)))

Theoremopsrtoslem2 19881* Lemma for opsrtos 19882. (Contributed by Mario Carneiro, 8-Feb-2015.)
𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Toset)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))    &   (𝜑𝑇 We 𝐼)    &   𝑆 = (𝐼 mPwSer 𝑅)    &   𝐵 = (Base‘𝑆)    &    < = (lt‘𝑅)    &   𝐶 = (𝑇 <bag 𝐼)    &   𝐷 = { ∈ (ℕ0𝑚 𝐼) ∣ ( “ ℕ) ∈ Fin}    &   (𝜓 ↔ ∃𝑧𝐷 ((𝑥𝑧) < (𝑦𝑧) ∧ ∀𝑤𝐷 (𝑤𝐶𝑧 → (𝑥𝑤) = (𝑦𝑤))))    &    = (le‘𝑂)       (𝜑𝑂 ∈ Toset)

Theoremopsrtos 19882 The ordered power series structure is a totally ordered set. (Contributed by Mario Carneiro, 10-Jan-2015.)
𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Toset)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))    &   (𝜑𝑇 We 𝐼)       (𝜑𝑂 ∈ Toset)

Theoremopsrso 19883 The ordered power series structure is a totally ordered set. (Contributed by Mario Carneiro, 10-Jan-2015.)
𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ Toset)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))    &   (𝜑𝑇 We 𝐼)    &    = (lt‘𝑂)    &   𝐵 = (Base‘𝑂)       (𝜑 Or 𝐵)

Theoremopsrcrng 19884 The ring of ordered power series is commutative ring. (Contributed by Mario Carneiro, 10-Jan-2015.)
𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ CRing)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))       (𝜑𝑂 ∈ CRing)

Theoremopsrassa 19885 The ring of ordered power series is an associative algebra. (Contributed by Mario Carneiro, 29-Dec-2014.)
𝑂 = ((𝐼 ordPwSer 𝑅)‘𝑇)    &   (𝜑𝐼𝑉)    &   (𝜑𝑅 ∈ CRing)    &   (𝜑𝑇 ⊆ (𝐼 × 𝐼))       (𝜑𝑂 ∈ AssAlg)

Theoremmplrcl 19886 Reverse closure for the polynomial index set. (Contributed by Stefan O'Rear, 19-Mar-2015.) (Revised by Mario Carneiro, 30-Aug-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐵 = (Base‘𝑃)       (𝑋𝐵𝐼 ∈ V)

Theoremmplelsfi 19887 A polynomial treated as a coefficient function has finitely many nonzero terms. (Contributed by Stefan O'Rear, 22-Mar-2015.) (Revised by AV, 25-Jun-2019.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐵 = (Base‘𝑃)    &    0 = (0g𝑅)    &   (𝜑𝐹𝐵)    &   (𝜑𝑅𝑉)       (𝜑𝐹 finSupp 0 )

Theoremmvrf2 19888 The power series/polynomial variable function maps indices to polynomials. (Contributed by Stefan O'Rear, 8-Mar-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝑉 = (𝐼 mVar 𝑅)    &   𝐵 = (Base‘𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)       (𝜑𝑉:𝐼𝐵)

Theoremmplmon2 19889* Express a scaled monomial. (Contributed by Stefan O'Rear, 8-Mar-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &    · = ( ·𝑠𝑃)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    1 = (1r𝑅)    &    0 = (0g𝑅)    &   𝐵 = (Base‘𝑅)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝐾𝐷)    &   (𝜑𝑋𝐵)       (𝜑 → (𝑋 · (𝑦𝐷 ↦ if(𝑦 = 𝐾, 1 , 0 ))) = (𝑦𝐷 ↦ if(𝑦 = 𝐾, 𝑋, 0 )))

Theorempsrbag0 19890* The empty bag is a bag. (Contributed by Stefan O'Rear, 9-Mar-2015.)
𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}       (𝐼𝑉 → (𝐼 × {0}) ∈ 𝐷)

Theorempsrbagsn 19891* A singleton bag is a bag. (Contributed by Stefan O'Rear, 9-Mar-2015.)
𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}       (𝐼𝑉 → (𝑥𝐼 ↦ if(𝑥 = 𝐾, 1, 0)) ∈ 𝐷)

Theoremmplascl 19892* Value of the scalar injection into the polynomial algebra. (Contributed by Stefan O'Rear, 9-Mar-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &   𝐵 = (Base‘𝑅)    &   𝐴 = (algSc‘𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝑋𝐵)       (𝜑 → (𝐴𝑋) = (𝑦𝐷 ↦ if(𝑦 = (𝐼 × {0}), 𝑋, 0 )))

Theoremmplasclf 19893 The scalar injection is a function into the polynomial algebra. (Contributed by Stefan O'Rear, 9-Mar-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐵 = (Base‘𝑃)    &   𝐾 = (Base‘𝑅)    &   𝐴 = (algSc‘𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)       (𝜑𝐴:𝐾𝐵)

Theoremsubrgascl 19894 The scalar injection function in a subring algebra is the same up to a restriction to the subring. (Contributed by Mario Carneiro, 4-Jul-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐴 = (algSc‘𝑃)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPoly 𝐻)    &   (𝜑𝐼𝑊)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))    &   𝐶 = (algSc‘𝑈)       (𝜑𝐶 = (𝐴𝑇))

Theoremsubrgasclcl 19895 The scalars in a polynomial algebra are in the subring algebra iff the scalar value is in the subring. (Contributed by Mario Carneiro, 4-Jul-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐴 = (algSc‘𝑃)    &   𝐻 = (𝑅s 𝑇)    &   𝑈 = (𝐼 mPoly 𝐻)    &   (𝜑𝐼𝑊)    &   (𝜑𝑇 ∈ (SubRing‘𝑅))    &   𝐵 = (Base‘𝑈)    &   𝐾 = (Base‘𝑅)    &   (𝜑𝑋𝐾)       (𝜑 → ((𝐴𝑋) ∈ 𝐵𝑋𝑇))

Theoremmplmon2cl 19896* A scaled monomial is a polynomial. (Contributed by Stefan O'Rear, 8-Mar-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &   𝐶 = (Base‘𝑅)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)    &   𝐵 = (Base‘𝑃)    &   (𝜑𝑋𝐶)    &   (𝜑𝐾𝐷)       (𝜑 → (𝑦𝐷 ↦ if(𝑦 = 𝐾, 𝑋, 0 )) ∈ 𝐵)

Theoremmplmon2mul 19897* Product of scaled monomials. (Contributed by Stefan O'Rear, 8-Mar-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &   𝐶 = (Base‘𝑅)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ CRing)    &    = (.r𝑃)    &    · = (.r𝑅)    &   (𝜑𝑋𝐷)    &   (𝜑𝑌𝐷)    &   (𝜑𝐹𝐶)    &   (𝜑𝐺𝐶)       (𝜑 → ((𝑦𝐷 ↦ if(𝑦 = 𝑋, 𝐹, 0 )) (𝑦𝐷 ↦ if(𝑦 = 𝑌, 𝐺, 0 ))) = (𝑦𝐷 ↦ if(𝑦 = (𝑋𝑓 + 𝑌), (𝐹 · 𝐺), 0 )))

Theoremmplind 19898* Prove a property of polynomials by "structural" induction, under a simplified model of structure which loses the sum of products structure. The commutativity condition is stronger than strictly needed. (Contributed by Stefan O'Rear, 11-Mar-2015.)
𝐾 = (Base‘𝑅)    &   𝑉 = (𝐼 mVar 𝑅)    &   𝑌 = (𝐼 mPoly 𝑅)    &    + = (+g𝑌)    &    · = (.r𝑌)    &   𝐶 = (algSc‘𝑌)    &   𝐵 = (Base‘𝑌)    &   ((𝜑 ∧ (𝑥𝐻𝑦𝐻)) → (𝑥 + 𝑦) ∈ 𝐻)    &   ((𝜑 ∧ (𝑥𝐻𝑦𝐻)) → (𝑥 · 𝑦) ∈ 𝐻)    &   ((𝜑𝑥𝐾) → (𝐶𝑥) ∈ 𝐻)    &   ((𝜑𝑥𝐼) → (𝑉𝑥) ∈ 𝐻)    &   (𝜑𝑋𝐵)    &   (𝜑𝐼 ∈ V)    &   (𝜑𝑅 ∈ CRing)       (𝜑𝑋𝐻)

Theoremmplcoe4 19899* Decompose a polynomial into a finite sum of scaled monomials. (Contributed by Stefan O'Rear, 8-Mar-2015.)
𝑃 = (𝐼 mPoly 𝑅)    &   𝐷 = {𝑓 ∈ (ℕ0𝑚 𝐼) ∣ (𝑓 “ ℕ) ∈ Fin}    &    0 = (0g𝑅)    &   𝐵 = (Base‘𝑃)    &   (𝜑𝐼𝑊)    &   (𝜑𝑅 ∈ Ring)    &   (𝜑𝑋𝐵)       (𝜑𝑋 = (𝑃 Σg (𝑘𝐷 ↦ (𝑦𝐷 ↦ if(𝑦 = 𝑘, (𝑋𝑘), 0 )))))

10.10.2  Polynomial evaluation

Syntaxces 19900 Evaluation of a multivariate polynomial in a subring.
class evalSub

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206 20501-20600 207 20601-20700 208 20701-20800 209 20801-20900 210 20901-21000 211 21001-21100 212 21101-21200 213 21201-21300 214 21301-21400 215 21401-21500 216 21501-21600 217 21601-21700 218 21701-21800 219 21801-21900 220 21901-22000 221 22001-22100 222 22101-22200 223 22201-22300 224 22301-22400 225 22401-22500 226 22501-22600 227 22601-22700 228 22701-22800 229 22801-22900 230 22901-23000 231 23001-23100 232 23101-23200 233 23201-23300 234 23301-23400 235 23401-23500 236 23501-23600 237 23601-23700 238 23701-23800 239 23801-23900 240 23901-24000 241 24001-24100 242 24101-24200 243 24201-24300 244 24301-24400 245 24401-24500 246 24501-24600 247 24601-24700 248 24701-24800 249 24801-24900 250 24901-25000 251 25001-25100 252 25101-25200 253 25201-25300 254 25301-25400 255 25401-25500 256 25501-25600 257 25601-25700 258 25701-25800 259 25801-25900 260 25901-26000 261 26001-26100 262 26101-26200 263 26201-26300 264 26301-26400 265 26401-26500 266 26501-26600 267 26601-26700 268 26701-26800 269 26801-26900 270 26901-27000 271 27001-27100 272 27101-27200 273 27201-27300 274 27301-27400 275 27401-27500 276 27501-27600 277 27601-27700 278 27701-27800 279 27801-27900 280 27901-28000 281 28001-28100 282 28101-28200 283 28201-28300 284 28301-28400 285 28401-28500 286 28501-28600 287 28601-28700 288 28701-28800 289 28801-28900 290 28901-29000 291 29001-29100 292 29101-29200 293 29201-29300 294 29301-29400 295 29401-29500 296 29501-29600 297 29601-29700 298 29701-29800 299 29801-29900 300 29901-30000 301 30001-30100 302 30101-30200 303 30201-30300 304 30301-30400 305 30401-30500 306 30501-30600 307 30601-30700 308 30701-30800 309 30801-30900 310 30901-31000 311 31001-31100 312 31101-31200 313 31201-31300 314 31301-31400 315 31401-31500 316 31501-31600 317 31601-31700 318 31701-31800 319 31801-31900 320 31901-32000 321 32001-32100 322 32101-32200 323 32201-32300 324 32301-32400 325 32401-32500 326 32501-32600 327 32601-32700 328 32701-32800 329 32801-32900 330 32901-33000 331 33001-33100 332 33101-33200 333 33201-33300 334 33301-33400 335 33401-33500 336 33501-33600 337 33601-33700 338 33701-33800 339 33801-33900 340 33901-34000 341 34001-34100 342 34101-34200 343 34201-34300 344 34301-34400 345 34401-34500 346 34501-34600 347 34601-34700 348 34701-34800 349 34801-34900 350 34901-35000 351 35001-35100 352 35101-35200 353 35201-35300 354 35301-35400 355 35401-35500 356 35501-35600 357 35601-35700 358 35701-35800 359 35801-35900 360 35901-36000 361 36001-36100 362 36101-36200 363 36201-36300 364 36301-36400 365 36401-36500 366 36501-36600 367 36601-36700 368 36701-36800 369 36801-36900 370 36901-37000 371 37001-37100 372 37101-37200 373 37201-37300 374 37301-37400 375 37401-37500 376 37501-37600 377 37601-37700 378 37701-37800 379 37801-37900 380 37901-38000 381 38001-38100 382 38101-38200 383 38201-38300 384 38301-38400 385 38401-38500 386 38501-38600 387 38601-38700 388 38701-38800 389 38801-38900 390 38901-39000 391 39001-39100 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