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| Mirrors > Home > MPE Home > Th. List > ghmfghm | Structured version Visualization version GIF version | ||
| Description: The function fulfilling the conditions of ghmgrp 19033 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 19033 | . 2 ⊢ (𝜑 → 𝐻 ∈ Grp) |
| 9 | fof 6746 | . . 3 ⊢ (𝐹:𝑋–onto→𝑌 → 𝐹:𝑋⟶𝑌) | |
| 10 | 7, 9 | syl 17 | . 2 ⊢ (𝜑 → 𝐹:𝑋⟶𝑌) |
| 11 | 6 | 3expb 1121 | . 2 ⊢ ((𝜑 ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → (𝐹‘(𝑥 + 𝑦)) = ((𝐹‘𝑥) ⨣ (𝐹‘𝑦))) |
| 12 | 1, 2, 3, 4, 5, 8, 10, 11 | isghmd 19191 | 1 ⊢ (𝜑 → 𝐹 ∈ (𝐺 GrpHom 𝐻)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ⟶wf 6488 –onto→wfo 6490 ‘cfv 6492 (class class class)co 7360 Basecbs 17170 +gcplusg 17211 Grpcgrp 18900 GrpHom cghm 19178 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-id 5519 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-fo 6498 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-1st 7935 df-2nd 7936 df-map 8768 df-0g 17395 df-mgm 18599 df-sgrp 18678 df-mnd 18694 df-grp 18903 df-minusg 18904 df-ghm 19179 |
| This theorem is referenced by: (None) |
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