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| Mirrors > Home > MPE Home > Th. List > Mathboxes > grpgimcanon | Structured version Visualization version GIF version | ||
| Description: The result of "canonicalizing" a group by discarding unneeded structural components and ensuring that the group operation is a binary operation is isomorphic to the original group. (Contributed by Eric Schmidt, 24-Oct-2026.) |
| Ref | Expression |
|---|---|
| grpgimcanon.1 | ⊢ 𝐵 = (Base‘𝐺) |
| grpgimcanon.2 | ⊢ ⨣ = (+𝑓‘𝐺) |
| grpgimcanon.3 | ⊢ 𝐻 = {〈(Base‘ndx), 𝐵〉, 〈(+g‘ndx), ⨣ 〉} |
| Ref | Expression |
|---|---|
| grpgimcanon | ⊢ (𝐺 ∈ Grp → ( I ↾ 𝐵) ∈ (𝐺 GrpIso 𝐻)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | grpgimcanon.1 | . . . 4 ⊢ 𝐵 = (Base‘𝐺) | |
| 2 | 1 | idghm 19471 | . . 3 ⊢ (𝐺 ∈ Grp → ( I ↾ 𝐵) ∈ (𝐺 GrpHom 𝐺)) |
| 3 | 1 | a1i 11 | . . . 4 ⊢ (𝐺 ∈ Grp → 𝐵 = (Base‘𝐺)) |
| 4 | 1 | fvexi 6919 | . . . . . 6 ⊢ 𝐵 ∈ V |
| 5 | grpgimcanon.3 | . . . . . . 7 ⊢ 𝐻 = {〈(Base‘ndx), 𝐵〉, 〈(+g‘ndx), ⨣ 〉} | |
| 6 | 5 | grpbase 17486 | . . . . . 6 ⊢ (𝐵 ∈ V → 𝐵 = (Base‘𝐻)) |
| 7 | 4, 6 | ax-mp 5 | . . . . 5 ⊢ 𝐵 = (Base‘𝐻) |
| 8 | 7 | a1i 11 | . . . 4 ⊢ (𝐺 ∈ Grp → 𝐵 = (Base‘𝐻)) |
| 9 | eqidd 2764 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → (𝑥(+g‘𝐺)𝑦) = (𝑥(+g‘𝐺)𝑦)) | |
| 10 | eqid 2763 | . . . . . . 7 ⊢ (+g‘𝐺) = (+g‘𝐺) | |
| 11 | grpgimcanon.2 | . . . . . . 7 ⊢ ⨣ = (+𝑓‘𝐺) | |
| 12 | 1, 10, 11 | plusfval 18849 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 ⨣ 𝑦) = (𝑥(+g‘𝐺)𝑦)) |
| 13 | 12 | adantl 487 | . . . . 5 ⊢ ((𝐺 ∈ Grp ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → (𝑥 ⨣ 𝑦) = (𝑥(+g‘𝐺)𝑦)) |
| 14 | 1, 11 | grpplusf 19185 | . . . . . . 7 ⊢ (𝐺 ∈ Grp → ⨣ :(𝐵 × 𝐵)⟶𝐵) |
| 15 | 4, 4 | xpex 7788 | . . . . . . . 8 ⊢ (𝐵 × 𝐵) ∈ V |
| 16 | fex2 7969 | . . . . . . . 8 ⊢ (( ⨣ :(𝐵 × 𝐵)⟶𝐵 ∧ (𝐵 × 𝐵) ∈ V ∧ 𝐵 ∈ V) → ⨣ ∈ V) | |
| 17 | 15, 4, 16 | mp3an23 1483 | . . . . . . 7 ⊢ ( ⨣ :(𝐵 × 𝐵)⟶𝐵 → ⨣ ∈ V) |
| 18 | 5 | grpplusg 17487 | . . . . . . 7 ⊢ ( ⨣ ∈ V → ⨣ = (+g‘𝐻)) |
| 19 | 14, 17, 18 | 3syl 19 | . . . . . 6 ⊢ (𝐺 ∈ Grp → ⨣ = (+g‘𝐻)) |
| 20 | 19 | oveqdr 7468 | . . . . 5 ⊢ ((𝐺 ∈ Grp ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → (𝑥 ⨣ 𝑦) = (𝑥(+g‘𝐻)𝑦)) |
| 21 | 13, 20 | eqtr3d 2800 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ (𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵)) → (𝑥(+g‘𝐺)𝑦) = (𝑥(+g‘𝐻)𝑦)) |
| 22 | 3, 3, 3, 8, 9, 21 | ghmpropd 19496 | . . 3 ⊢ (𝐺 ∈ Grp → (𝐺 GrpHom 𝐺) = (𝐺 GrpHom 𝐻)) |
| 23 | 2, 22 | eleqtrd 2866 | . 2 ⊢ (𝐺 ∈ Grp → ( I ↾ 𝐵) ∈ (𝐺 GrpHom 𝐻)) |
| 24 | f1oi 6883 | . 2 ⊢ ( I ↾ 𝐵):𝐵⟶1-1onto𝐵 | |
| 25 | 1, 7 | isgim 19502 | . 2 ⊢ (( I ↾ 𝐵) ∈ (𝐺 GrpIso 𝐻) ↔ (( I ↾ 𝐵) ∈ (𝐺 GrpHom 𝐻) ∧ ( I ↾ 𝐵):𝐵⟶1-1onto𝐵)) |
| 26 | 23, 24, 25 | sylanblrc 602 | 1 ⊢ (𝐺 ∈ Grp → ( I ↾ 𝐵) ∈ (𝐺 GrpIso 𝐻)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2147 Vcvv 3454 {cpr 4590 〈cop 4838 I cid 5549 × cxp 5653 ↾ cres 5657 ⟶wf 6551 ⟶1-1ontowf1o 6554 ‘cfv 6555 (class class class)co 7440 ndxcnx 17397 Basecbs 17413 +gcplusg 17454 +𝑓cplusf 18839 Grpcgrp 19170 GrpHom cghm 19453 GrpIso cgim 19497 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7772 ax-cnex 11280 ax-resscn 11281 ax-1cn 11282 ax-icn 11283 ax-addcl 11284 ax-addrcl 11285 ax-mulcl 11286 ax-mulrcl 11287 ax-mulcom 11288 ax-addass 11289 ax-mulass 11290 ax-distr 11291 ax-i2m1 11292 ax-1ne0 11293 ax-1rid 11294 ax-rnegex 11295 ax-rrecex 11296 ax-cnre 11297 ax-pre-lttri 11298 ax-pre-lttrn 11299 ax-pre-ltadd 11300 ax-pre-mulgt0 11301 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6319 df-ord 6380 df-on 6381 df-lim 6382 df-suc 6383 df-iota 6509 df-fun 6557 df-fn 6558 df-f 6559 df-f1 6560 df-fo 6561 df-f1o 6562 df-fv 6563 df-riota 7397 df-ov 7443 df-oprab 7444 df-mpo 7445 df-om 7899 df-1st 8022 df-2nd 8023 df-frecs 8324 df-wrecs 8355 df-recs 8404 df-rdg 8443 df-1o 8501 df-er 8742 df-map 8874 df-en 8999 df-dom 9000 df-sdom 9001 df-fin 9002 df-pnf 11369 df-mnf 11370 df-xr 11371 df-ltxr 11372 df-le 11373 df-sub 11567 df-neg 11568 df-nn 12360 df-2 12429 df-n0 12631 df-z 12718 df-uz 12990 df-fz 13664 df-struct 17351 df-slot 17386 df-ndx 17398 df-base 17414 df-plusg 17467 df-0g 17638 df-plusf 18841 df-mgm 18842 df-sgrp 18934 df-mnd 18950 df-mhm 19004 df-grp 19173 df-ghm 19454 df-gim 19499 |
| This theorem is used by: fingrphf 46229 |
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