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Mirrors > Home > MPE Home > Th. List > giclcl | Structured version Visualization version GIF version |
Description: Isomorphism implies the left side is a group. (Contributed by Stefan O'Rear, 25-Jan-2015.) |
Ref | Expression |
---|---|
giclcl | ⊢ (𝑅 ≃𝑔 𝑆 → 𝑅 ∈ Grp) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | brgic 18800 | . . 3 ⊢ (𝑅 ≃𝑔 𝑆 ↔ (𝑅 GrpIso 𝑆) ≠ ∅) | |
2 | n0 4277 | . . 3 ⊢ ((𝑅 GrpIso 𝑆) ≠ ∅ ↔ ∃𝑓 𝑓 ∈ (𝑅 GrpIso 𝑆)) | |
3 | 1, 2 | bitri 274 | . 2 ⊢ (𝑅 ≃𝑔 𝑆 ↔ ∃𝑓 𝑓 ∈ (𝑅 GrpIso 𝑆)) |
4 | gimghm 18795 | . . . 4 ⊢ (𝑓 ∈ (𝑅 GrpIso 𝑆) → 𝑓 ∈ (𝑅 GrpHom 𝑆)) | |
5 | ghmgrp1 18751 | . . . 4 ⊢ (𝑓 ∈ (𝑅 GrpHom 𝑆) → 𝑅 ∈ Grp) | |
6 | 4, 5 | syl 17 | . . 3 ⊢ (𝑓 ∈ (𝑅 GrpIso 𝑆) → 𝑅 ∈ Grp) |
7 | 6 | exlimiv 1934 | . 2 ⊢ (∃𝑓 𝑓 ∈ (𝑅 GrpIso 𝑆) → 𝑅 ∈ Grp) |
8 | 3, 7 | sylbi 216 | 1 ⊢ (𝑅 ≃𝑔 𝑆 → 𝑅 ∈ Grp) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∃wex 1783 ∈ wcel 2108 ≠ wne 2942 ∅c0 4253 class class class wbr 5070 (class class class)co 7255 Grpcgrp 18492 GrpHom cghm 18746 GrpIso cgim 18788 ≃𝑔 cgic 18789 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-rep 5205 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-iun 4923 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-suc 6257 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-ov 7258 df-oprab 7259 df-mpo 7260 df-1st 7804 df-2nd 7805 df-1o 8267 df-ghm 18747 df-gim 18790 df-gic 18791 |
This theorem is referenced by: gicer 18807 |
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