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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 2229 | . . 3 ⊢ (Base‘𝐺) = (Base‘𝐺) | |
| 2 | eqid 2229 | . . 3 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
| 3 | eqid 2229 | . . 3 ⊢ (0g‘𝐺) = (0g‘𝐺) | |
| 4 | eqid 2229 | . . 3 ⊢ (invg‘𝐺) = (invg‘𝐺) | |
| 5 | eqid 2229 | . . 3 ⊢ (.g‘𝐺) = (.g‘𝐺) | |
| 6 | 1, 2, 3, 4, 5 | mulgfvalg 13679 | . 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 9471 | . . 3 ⊢ ℤ ∈ V | |
| 8 | basfn 13112 | . . . 4 ⊢ Base Fn V | |
| 9 | elex 2811 | . . . 4 ⊢ (𝐺 ∈ 𝑉 → 𝐺 ∈ V) | |
| 10 | funfvex 5649 | . . . . 5 ⊢ ((Fun Base ∧ 𝐺 ∈ dom Base) → (Base‘𝐺) ∈ V) | |
| 11 | 10 | funfni 5426 | . . . 4 ⊢ ((Base Fn V ∧ 𝐺 ∈ V) → (Base‘𝐺) ∈ V) |
| 12 | 8, 9, 11 | sylancr 414 | . . 3 ⊢ (𝐺 ∈ 𝑉 → (Base‘𝐺) ∈ V) |
| 13 | mpoexga 6369 | . . 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 2306 | 1 ⊢ (𝐺 ∈ 𝑉 → (.g‘𝐺) ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ∈ wcel 2200 Vcvv 2799 ifcif 3602 {csn 3666 class class class wbr 4083 × cxp 4718 Fn wfn 5316 ‘cfv 5321 ∈ cmpo 6012 0cc0 8015 1c1 8016 < clt 8197 -cneg 8334 ℕcn 9126 ℤcz 9462 seqcseq 10686 Basecbs 13053 +gcplusg 13131 0gc0g 13310 invgcminusg 13555 .gcmg 13677 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4199 ax-sep 4202 ax-pow 4259 ax-pr 4294 ax-un 4525 ax-setind 4630 ax-iinf 4681 ax-cnex 8106 ax-resscn 8107 ax-1re 8109 ax-addrcl 8112 |
| This theorem depends on definitions: df-bi 117 df-3or 1003 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2801 df-sbc 3029 df-csb 3125 df-un 3201 df-in 3203 df-ss 3210 df-if 3603 df-pw 3651 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-iun 3967 df-br 4084 df-opab 4146 df-mpt 4147 df-tr 4183 df-id 4385 df-iord 4458 df-on 4460 df-iom 4684 df-xp 4726 df-rel 4727 df-cnv 4728 df-co 4729 df-dm 4730 df-rn 4731 df-res 4732 df-ima 4733 df-iota 5281 df-fun 5323 df-fn 5324 df-f 5325 df-f1 5326 df-fo 5327 df-f1o 5328 df-fv 5329 df-ov 6013 df-oprab 6014 df-mpo 6015 df-1st 6295 df-2nd 6296 df-recs 6462 df-frec 6548 df-neg 8336 df-inn 9127 df-z 9463 df-seqfrec 10687 df-ndx 13056 df-slot 13057 df-base 13059 df-mulg 13678 |
| This theorem is referenced by: zlmval 14612 zlmlemg 14613 zlmsca 14617 zlmvscag 14618 |
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