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| Mirrors > Home > ILE Home > Th. List > mulgex | GIF version | ||
| Description: Existence of the group multiple operation. (Contributed by Jim Kingdon, 22-Apr-2025.) |
| Ref | Expression |
|---|---|
| mulgex | ⊢ (𝐺 ∈ 𝑉 → (.g‘𝐺) ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2230 | . . 3 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
| 2 | eqid 2230 | . . 3 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
| 3 | eqid 2230 | . . 3 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
| 4 | eqid 2230 | . . 3 ⊢ (invg‘𝐺) = (invg‘𝐺) | |
| 5 | eqid 2230 | . . 3 ⊢ (.g‘𝐺) = (.g‘𝐺) | |
| 6 | 1, 2, 3, 4, 5 | mulgfvalg 13731 | . 2 ⊢ (𝐺 ∈ 𝑉 → (.g‘𝐺) = (𝑛 ∈ ℤ, 𝑥 ∈ (Base‘𝐺) ↦ if(𝑛 = 0, (0g‘𝐺), if(0 < 𝑛, (seq1((+g‘𝐺), (ℕ × {𝑥}))‘𝑛), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑥}))‘-𝑛)))))) |
| 7 | zex 9493 | . . 3 ⊢ ℤ ∈ V | |
| 8 | basfn 13164 | . . . 4 ⊢ Base Fn V | |
| 9 | elex 2813 | . . . 4 ⊢ (𝐺 ∈ 𝑉 → 𝐺 ∈ V) | |
| 10 | funfvex 5659 | . . . . 5 ⊢ ((Fun Base ∧ 𝐺 ∈ dom Base) → (Base‘𝐺) ∈ V) | |
| 11 | 10 | funfni 5434 | . . . 4 ⊢ ((Base Fn V ∧ 𝐺 ∈ V) → (Base‘𝐺) ∈ V) |
| 12 | 8, 9, 11 | sylancr 414 | . . 3 ⊢ (𝐺 ∈ 𝑉 → (Base‘𝐺) ∈ V) |
| 13 | mpoexga 6382 | . . 3 ⊢ ((ℤ ∈ V ∧ (Base‘𝐺) ∈ V) → (𝑛 ∈ ℤ, 𝑥 ∈ (Base‘𝐺) ↦ if(𝑛 = 0, (0g‘𝐺), if(0 < 𝑛, (seq1((+g‘𝐺), (ℕ × {𝑥}))‘𝑛), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑥}))‘-𝑛))))) ∈ V) | |
| 14 | 7, 12, 13 | sylancr 414 | . 2 ⊢ (𝐺 ∈ 𝑉 → (𝑛 ∈ ℤ, 𝑥 ∈ (Base‘𝐺) ↦ if(𝑛 = 0, (0g‘𝐺), if(0 < 𝑛, (seq1((+g‘𝐺), (ℕ × {𝑥}))‘𝑛), ((invg‘𝐺)‘(seq1((+g‘𝐺), (ℕ × {𝑥}))‘-𝑛))))) ∈ V) |
| 15 | 6, 14 | eqeltrd 2307 | 1 ⊢ (𝐺 ∈ 𝑉 → (.g‘𝐺) ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 ∈ wcel 2201 Vcvv 2801 ifcif 3604 {csn 3670 class class class wbr 4089 × cxp 4725 Fn wfn 5323 ‘cfv 5328 ∈ cmpo 6025 0cc0 8037 1c1 8038 < clt 8219 -cneg 8356 ℕcn 9148 ℤcz 9484 seqcseq 10715 Basecbs 13105 +gcplusg 13183 0gc0g 13362 invgcminusg 13607 .gcmg 13729 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2203 ax-14 2204 ax-ext 2212 ax-coll 4205 ax-sep 4208 ax-pow 4266 ax-pr 4301 ax-un 4532 ax-setind 4637 ax-iinf 4688 ax-cnex 8128 ax-resscn 8129 ax-1re 8131 ax-addrcl 8134 |
| This theorem depends on definitions: df-bi 117 df-3or 1005 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1810 df-eu 2081 df-mo 2082 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-ral 2514 df-rex 2515 df-reu 2516 df-rab 2518 df-v 2803 df-sbc 3031 df-csb 3127 df-un 3203 df-in 3205 df-ss 3212 df-if 3605 df-pw 3655 df-sn 3676 df-pr 3677 df-op 3679 df-uni 3895 df-int 3930 df-iun 3973 df-br 4090 df-opab 4152 df-mpt 4153 df-tr 4189 df-id 4392 df-iord 4465 df-on 4467 df-iom 4691 df-xp 4733 df-rel 4734 df-cnv 4735 df-co 4736 df-dm 4737 df-rn 4738 df-res 4739 df-ima 4740 df-iota 5288 df-fun 5330 df-fn 5331 df-f 5332 df-f1 5333 df-fo 5334 df-f1o 5335 df-fv 5336 df-ov 6026 df-oprab 6027 df-mpo 6028 df-1st 6308 df-2nd 6309 df-recs 6476 df-frec 6562 df-neg 8358 df-inn 9149 df-z 9485 df-seqfrec 10716 df-ndx 13108 df-slot 13109 df-base 13111 df-mulg 13730 |
| This theorem is referenced by: zlmval 14665 zlmlemg 14666 zlmsca 14670 zlmvscag 14671 |
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