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| Mirrors > Home > MPE Home > Th. List > mhp0cl | Structured version Visualization version GIF version | ||
| Description: The zero polynomial is homogeneous. Under df-mhp 22310, it has any (nonnegative integer) degree which loosely corresponds to the value "undefined". The values -∞ and 0 are also used in Metamath (by df-mdeg 26223 and df-dgr 26359 respectively) and the literature: https://math.stackexchange.com/a/1796314/593843 26359. (Contributed by SN, 12-Sep-2023.) |
| Ref | Expression |
|---|---|
| mhp0cl.h | ⊢ 𝐻 = (𝐼 mHomP 𝑅) |
| mhp0cl.0 | ⊢ 0 = (0g‘𝑅) |
| mhp0cl.d | ⊢ 𝐷 = {ℎ ∈ (ℕ0 ↑m 𝐼) ∣ (◡ℎ “ ℕ) ∈ Fin} |
| mhp0cl.i | ⊢ (𝜑 → 𝐼 ∈ 𝑉) |
| mhp0cl.r | ⊢ (𝜑 → 𝑅 ∈ Grp) |
| mhp0cl.n | ⊢ (𝜑 → 𝑁 ∈ ℕ0) |
| Ref | Expression |
|---|---|
| mhp0cl | ⊢ (𝜑 → (𝐷 × { 0 }) ∈ (𝐻‘𝑁)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mhp0cl.h | . 2 ⊢ 𝐻 = (𝐼 mHomP 𝑅) | |
| 2 | eqid 2762 | . 2 ⊢ (𝐼 mPoly 𝑅) = (𝐼 mPoly 𝑅) | |
| 3 | eqid 2762 | . 2 ⊢ (Base‘(𝐼 mPoly 𝑅)) = (Base‘(𝐼 mPoly 𝑅)) | |
| 4 | mhp0cl.0 | . 2 ⊢ 0 = (0g‘𝑅) | |
| 5 | mhp0cl.d | . 2 ⊢ 𝐷 = {ℎ ∈ (ℕ0 ↑m 𝐼) ∣ (◡ℎ “ ℕ) ∈ Fin} | |
| 6 | mhp0cl.n | . 2 ⊢ (𝜑 → 𝑁 ∈ ℕ0) | |
| 7 | eqid 2762 | . . . 4 ⊢ (0g‘(𝐼 mPoly 𝑅)) = (0g‘(𝐼 mPoly 𝑅)) | |
| 8 | mhp0cl.i | . . . 4 ⊢ (𝜑 → 𝐼 ∈ 𝑉) | |
| 9 | mhp0cl.r | . . . 4 ⊢ (𝜑 → 𝑅 ∈ Grp) | |
| 10 | 2, 5, 4, 7, 8, 9 | mpl0 22166 | . . 3 ⊢ (𝜑 → (0g‘(𝐼 mPoly 𝑅)) = (𝐷 × { 0 })) |
| 11 | 2 | mplgrp 22177 | . . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝑅 ∈ Grp) → (𝐼 mPoly 𝑅) ∈ Grp) |
| 12 | 8, 9, 11 | syl2anc 595 | . . . 4 ⊢ (𝜑 → (𝐼 mPoly 𝑅) ∈ Grp) |
| 13 | 3, 7 | grpidcl 19038 | . . . 4 ⊢ ((𝐼 mPoly 𝑅) ∈ Grp → (0g‘(𝐼 mPoly 𝑅)) ∈ (Base‘(𝐼 mPoly 𝑅))) |
| 14 | 12, 13 | syl 18 | . . 3 ⊢ (𝜑 → (0g‘(𝐼 mPoly 𝑅)) ∈ (Base‘(𝐼 mPoly 𝑅))) |
| 15 | 10, 14 | eqeltrrd 2863 | . 2 ⊢ (𝜑 → (𝐷 × { 0 }) ∈ (Base‘(𝐼 mPoly 𝑅))) |
| 16 | fczsupp0 8187 | . . . 4 ⊢ ((𝐷 × { 0 }) supp 0 ) = ∅ | |
| 17 | 0ss 4356 | . . . 4 ⊢ ∅ ⊆ {𝑔 ∈ 𝐷 ∣ ((ℂfld ↾s ℕ0) Σg 𝑔) = 𝑁} | |
| 18 | 16, 17 | eqsstri 3982 | . . 3 ⊢ ((𝐷 × { 0 }) supp 0 ) ⊆ {𝑔 ∈ 𝐷 ∣ ((ℂfld ↾s ℕ0) Σg 𝑔) = 𝑁} |
| 19 | 18 | a1i 11 | . 2 ⊢ (𝜑 → ((𝐷 × { 0 }) supp 0 ) ⊆ {𝑔 ∈ 𝐷 ∣ ((ℂfld ↾s ℕ0) Σg 𝑔) = 𝑁}) |
| 20 | 1, 2, 3, 4, 5, 6, 15, 19 | ismhp2 22315 | 1 ⊢ (𝜑 → (𝐷 × { 0 }) ∈ (𝐻‘𝑁)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2142 {crab 3415 ⊆ wss 3904 ∅c0 4285 {csn 4588 × cxp 5658 ◡ccnv 5659 “ cima 5663 ‘cfv 6536 (class class class)co 7412 supp csupp 8154 ↑m cmap 8822 Fincfn 8941 ℕcn 12239 ℕ0cn0 12510 Basecbs 17275 ↾s cress 17296 0gc0g 17498 Σg cgsu 17499 Grpcgrp 19006 ℂfldccnfld 21533 mPoly cmpl 22067 mHomP cmhp 22307 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-rep 5237 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4595 df-uni 4872 df-iun 4957 df-br 5109 df-opab 5173 df-mpt 5192 df-tr 5218 df-id 5555 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-of 7676 df-om 7861 df-1st 7984 df-2nd 7985 df-supp 8155 df-frecs 8276 df-wrecs 8307 df-recs 8356 df-rdg 8395 df-1o 8451 df-er 8692 df-map 8824 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9320 df-sup 9400 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-sub 11449 df-neg 11450 df-nn 12240 df-2 12309 df-3 12310 df-4 12311 df-5 12312 df-6 12313 df-7 12314 df-8 12315 df-9 12316 df-n0 12511 df-z 12598 df-dec 12718 df-uz 12869 df-fz 13542 df-struct 17213 df-sets 17230 df-slot 17248 df-ndx 17260 df-base 17276 df-ress 17297 df-plusg 17329 df-mulr 17330 df-sca 17332 df-vsca 17333 df-ip 17334 df-tset 17335 df-ple 17336 df-ds 17338 df-hom 17340 df-cco 17341 df-0g 17500 df-prds 17506 df-pws 17508 df-mgm 18704 df-sgrp 18783 df-mnd 18799 df-grp 19009 df-minusg 19010 df-subg 19195 df-psr 22070 df-mpl 22072 df-mhp 22310 |
| This theorem is used by: mhpsubg 22327 mhpind 43354 prjcrv0 43393 |
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