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Theorem srascag 14889
Description: The set of scalars of a subring algebra. (Contributed by Stefan O'Rear, 27-Nov-2014.) (Revised by Mario Carneiro, 4-Oct-2015.) (Revised by Thierry Arnoux, 16-Jun-2019.) (Proof shortened by AV, 12-Nov-2024.)
Hypotheses
Ref Expression
srapart.a (𝜑 → 𝐴 = ((subringAlg ‘𝑊)‘𝑆))
srapart.s (𝜑 → 𝑆 ⊆ (Base‘𝑊))
srapart.ex (𝜑 → 𝑊 ∈ 𝑋)
Assertion
Ref Expression
srascag (𝜑 → (𝑊 ↾s 𝑆) = (Scalar‘𝐴))

Proof of Theorem srascag
StepHypRef Expression
1 srapart.ex . . . . 5 (𝜑 → 𝑊 ∈ 𝑋)
2 scaslid 13567 . . . . . . 7 (Scalar = Slot (Scalar‘ndx) ∧ (Scalar‘ndx) ∈ ℕ)
32simpri 113 . . . . . 6 (Scalar‘ndx) ∈ ℕ
43a1i 9 . . . . 5 (𝜑 → (Scalar‘ndx) ∈ ℕ)
5 basfn 13470 . . . . . . . 8 Base Fn V
61elexd 2835 . . . . . . . 8 (𝜑 → 𝑊 ∈ V)
7 funfvex 5715 . . . . . . . . 9 ((Fun Base ∧ 𝑊 ∈ dom Base) → (Base‘𝑊) ∈ V)
87funfni 5486 . . . . . . . 8 ((Base Fn V ∧ 𝑊 ∈ V) → (Base‘𝑊) ∈ V)
95, 6, 8sylancr 418 . . . . . . 7 (𝜑 → (Base‘𝑊) ∈ V)
10 srapart.s . . . . . . 7 (𝜑 → 𝑆 ⊆ (Base‘𝑊))
119, 10ssexd 4275 . . . . . 6 (𝜑 → 𝑆 ∈ V)
12 ressex 13478 . . . . . 6 ((𝑊 ∈ 𝑋 ∧ 𝑆 ∈ V) → (𝑊 ↾s 𝑆) ∈ V)
131, 11, 12syl2anc 415 . . . . 5 (𝜑 → (𝑊 ↾s 𝑆) ∈ V)
14 setsex 13443 . . . . 5 ((𝑊 ∈ 𝑋 ∧ (Scalar‘ndx) ∈ ℕ ∧ (𝑊 ↾s 𝑆) ∈ V) → (𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) ∈ V)
151, 4, 13, 14syl3anc 1278 . . . 4 (𝜑 → (𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) ∈ V)
16 mulrslid 13546 . . . . . 6 (.r = Slot (.r‘ndx) ∧ (.r‘ndx) ∈ ℕ)
1716slotex 13438 . . . . 5 (𝑊 ∈ 𝑋 → (.r‘𝑊) ∈ V)
181, 17syl 14 . . . 4 (𝜑 → (.r‘𝑊) ∈ V)
19 vscandxnscandx 13576 . . . . . 6 ( ·𝑠 ‘ndx) ≠ (Scalar‘ndx)
2019necomi 2505 . . . . 5 (Scalar‘ndx) ≠ ( ·𝑠 ‘ndx)
21 vscaslid 13577 . . . . . 6 ( ·𝑠 = Slot ( ·𝑠 ‘ndx) ∧ ( ·𝑠 ‘ndx) ∈ ℕ)
2221simpri 113 . . . . 5 ( ·𝑠 ‘ndx) ∈ ℕ
232, 20, 22setsslnid 13463 . . . 4 (((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) ∈ V ∧ (.r‘𝑊) ∈ V) → (Scalar‘(𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩)) = (Scalar‘((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩)))
2415, 18, 23syl2anc 415 . . 3 (𝜑 → (Scalar‘(𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩)) = (Scalar‘((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩)))
2522a1i 9 . . . . 5 (𝜑 → ( ·𝑠 ‘ndx) ∈ ℕ)
26 setsex 13443 . . . . 5 (((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) ∈ V ∧ ( ·𝑠 ‘ndx) ∈ ℕ ∧ (.r‘𝑊) ∈ V) → ((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩) ∈ V)
2715, 25, 18, 26syl3anc 1278 . . . 4 (𝜑 → ((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩) ∈ V)
28 slotsdifipndx 13589 . . . . . 6 (( ·𝑠 ‘ndx) ≠ (·𝑖‘ndx) ∧ (Scalar‘ndx) ≠ (·𝑖‘ndx))
2928simpri 113 . . . . 5 (Scalar‘ndx) ≠ (·𝑖‘ndx)
30 ipslid 13585 . . . . . 6 (·𝑖 = Slot (·𝑖‘ndx) ∧ (·𝑖‘ndx) ∈ ℕ)
3130simpri 113 . . . . 5 (·𝑖‘ndx) ∈ ℕ
322, 29, 31setsslnid 13463 . . . 4 ((((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩) ∈ V ∧ (.r‘𝑊) ∈ V) → (Scalar‘((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩)) = (Scalar‘(((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩) sSet ⟨(·𝑖‘ndx), (.r‘𝑊)⟩)))
3327, 18, 32syl2anc 415 . . 3 (𝜑 → (Scalar‘((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩)) = (Scalar‘(((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩) sSet ⟨(·𝑖‘ndx), (.r‘𝑊)⟩)))
3424, 33eqtrd 2271 . 2 (𝜑 → (Scalar‘(𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩)) = (Scalar‘(((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩) sSet ⟨(·𝑖‘ndx), (.r‘𝑊)⟩)))
352setsslid 13462 . . 3 ((𝑊 ∈ 𝑋 ∧ (𝑊 ↾s 𝑆) ∈ V) → (𝑊 ↾s 𝑆) = (Scalar‘(𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩)))
361, 13, 35syl2anc 415 . 2 (𝜑 → (𝑊 ↾s 𝑆) = (Scalar‘(𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩)))
37 srapart.a . . . 4 (𝜑 → 𝐴 = ((subringAlg ‘𝑊)‘𝑆))
38 sraval 14884 . . . . 5 ((𝑊 ∈ V ∧ 𝑆 ⊆ (Base‘𝑊)) → ((subringAlg ‘𝑊)‘𝑆) = (((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩) sSet ⟨(·𝑖‘ndx), (.r‘𝑊)⟩))
396, 10, 38syl2anc 415 . . . 4 (𝜑 → ((subringAlg ‘𝑊)‘𝑆) = (((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩) sSet ⟨(·𝑖‘ndx), (.r‘𝑊)⟩))
4037, 39eqtrd 2271 . . 3 (𝜑 → 𝐴 = (((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩) sSet ⟨(·𝑖‘ndx), (.r‘𝑊)⟩))
4140fveq2d 5702 . 2 (𝜑 → (Scalar‘𝐴) = (Scalar‘(((𝑊 sSet ⟨(Scalar‘ndx), (𝑊 ↾s 𝑆)⟩) sSet ⟨( ·𝑠 ‘ndx), (.r‘𝑊)⟩) sSet ⟨(·𝑖‘ndx), (.r‘𝑊)⟩)))
4234, 36, 413eqtr4d 2281 1 (𝜑 → (𝑊 ↾s 𝑆) = (Scalar‘𝐴))
Colors of variables:    wff set class
This proof depends on syntax axioms:   → wi 4   = wceq 1402   ∈ wcel 2209   ≠ wne 2420  Vcvv 2821   ⊆ wss 3220  ⟨cop 3712   Fn wfn 5375  ‘cfv 5380  (class class class)co 6088  ℕcn 9314  ndxcnx 13408   sSet csts 13409  Slot cslot 13410  Basecbs 13411   ↾s cress 13412  .rcmulr 13492  Scalarcsca 13494   ·𝑠 cvsca 13495  ·𝑖cip 13496  subringAlg csra 14880
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4248  ax-sep 4251  ax-pow 4313  ax-pr 4348  ax-un 4580  ax-setind 4686  ax-cnex 8277  ax-resscn 8278  ax-1cn 8279  ax-1re 8280  ax-icn 8281  ax-addcl 8282  ax-addrcl 8283  ax-mulcl 8284  ax-addcom 8286  ax-addass 8288  ax-i2m1 8291  ax-0lt1 8292  ax-0id 8294  ax-rnegex 8295  ax-pre-ltirr 8298  ax-pre-lttrn 8300  ax-pre-ltadd 8302
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-int 3971  df-iun 4014  df-br 4132  df-opab 4194  df-mpt 4195  df-id 4440  df-xp 4782  df-rel 4783  df-cnv 4784  df-co 4785  df-dm 4786  df-rn 4787  df-res 4788  df-ima 4789  df-iota 5340  df-fun 5382  df-fn 5383  df-f 5384  df-f1 5385  df-fo 5386  df-f1o 5387  df-fv 5388  df-ov 6091  df-oprab 6092  df-mpo 6093  df-pnf 8369  df-mnf 8370  df-ltxr 8372  df-inn 9315  df-2 9373  df-3 9374  df-4 9375  df-5 9376  df-6 9377  df-7 9378  df-8 9379  df-ndx 13414  df-slot 13415  df-base 13417  df-sets 13418  df-iress 13419  df-mulr 13505  df-sca 13507  df-vsca 13508  df-ip 13509  df-sra 14882
This theorem is used by:  sralmod  14897  rlmscabas  14907
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