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| Mirrors > Home > ILE Home > Th. List > ghmfghm | GIF version | ||
| Description: The function fulfilling the conditions of ghmgrp 13923 is a group homomorphism. (Contributed by Thierry Arnoux, 26-Jan-2020.) |
| Ref | Expression |
|---|---|
| ghmabl.x | ⊢ 𝑋 = (Base‘𝐺) |
| ghmabl.y | ⊢ 𝑌 = (Base‘𝐻) |
| ghmabl.p | ⊢ + = (+g‘𝐺) |
| ghmabl.q | ⊢ ⨣ = (+g‘𝐻) |
| ghmabl.f | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋) → (𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) ⨣ (𝐹‘𝑦))) |
| ghmabl.1 | ⊢ (𝜑 → 𝐹:𝑋–onto→𝑌) |
| ghmfghm.3 | ⊢ (𝜑 → 𝐺 ∈ Grp) |
| Ref | Expression |
|---|---|
| ghmfghm | ⊢ (𝜑 → 𝐹 ∈ (𝐺 GrpHom 𝐻)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ghmabl.x | . 2 ⊢ 𝑋 = (Base‘𝐺) | |
| 2 | ghmabl.y | . 2 ⊢ 𝑌 = (Base‘𝐻) | |
| 3 | ghmabl.p | . 2 ⊢ + = (+g‘𝐺) | |
| 4 | ghmabl.q | . 2 ⊢ ⨣ = (+g‘𝐻) | |
| 5 | ghmfghm.3 | . 2 ⊢ (𝜑 → 𝐺 ∈ Grp) | |
| 6 | ghmabl.f | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋) → (𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) ⨣ (𝐹‘𝑦))) | |
| 7 | ghmabl.1 | . . 3 ⊢ (𝜑 → 𝐹:𝑋–onto→𝑌) | |
| 8 | 6, 1, 2, 3, 4, 7, 5 | ghmgrp 13923 | . 2 ⊢ (𝜑 → 𝐻 ∈ Grp) |
| 9 | fof 5615 | . . 3 ⊢ (𝐹:𝑋–onto→𝑌 → 𝐹:𝑋⟶𝑌) | |
| 10 | 7, 9 | syl 14 | . 2 ⊢ (𝜑 → 𝐹:𝑋⟶𝑌) |
| 11 | 6 | 3expb 1235 | . 2 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → (𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) ⨣ (𝐹‘𝑦))) |
| 12 | 1, 2, 3, 4, 5, 8, 10, 11 | isghmd 14057 | 1 ⊢ (𝜑 → 𝐹 ∈ (𝐺 GrpHom 𝐻)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∧ w3a 1009 = wceq 1402 ∈ wcel 2209 ⟶wf 5373 –onto→wfo 5375 ‘cfv 5377 (class class class)co 6085 Basecbs 13354 +gcplusg 13433 Grpcgrp 13807 GrpHom cghm 14045 |
| 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 4246 ax-sep 4249 ax-pow 4311 ax-pr 4346 ax-un 4578 ax-setind 4684 ax-cnex 8270 ax-resscn 8271 ax-1re 8273 ax-addrcl 8276 |
| 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-ral 2533 df-rex 2534 df-reu 2535 df-rmo 2536 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-pw 3690 df-sn 3715 df-pr 3716 df-op 3718 df-uni 3936 df-int 3971 df-iun 4014 df-br 4131 df-opab 4193 df-mpt 4194 df-id 4438 df-xp 4780 df-rel 4781 df-cnv 4782 df-co 4783 df-dm 4784 df-rn 4785 df-res 4786 df-ima 4787 df-iota 5337 df-fun 5379 df-fn 5380 df-f 5381 df-f1 5382 df-fo 5383 df-f1o 5384 df-fv 5385 df-riota 6038 df-ov 6088 df-oprab 6089 df-mpo 6090 df-inn 9306 df-2 9364 df-ndx 13357 df-slot 13358 df-base 13360 df-plusg 13446 df-0g 13614 df-mgm 13678 df-sgrp 13719 df-mnd 13732 df-grp 13810 df-minusg 13811 df-ghm 14046 |
| This theorem is used by: (None) |
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