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Mirrors > Home > ILE Home > Th. List > grp1inv | GIF version |
Description: The inverse function of the trivial group. (Contributed by FL, 21-Jun-2010.) (Revised by AV, 26-Aug-2021.) |
Ref | Expression |
---|---|
grp1.m | ⊢ 𝑀 = {〈(Base‘ndx), {𝐼}〉, 〈(+g‘ndx), {〈〈𝐼, 𝐼〉, 𝐼〉}〉} |
Ref | Expression |
---|---|
grp1inv | ⊢ (𝐼 ∈ 𝑉 → (invg‘𝑀) = ( I ↾ {𝐼})) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | grp1.m | . . . . 5 ⊢ 𝑀 = {〈(Base‘ndx), {𝐼}〉, 〈(+g‘ndx), {〈〈𝐼, 𝐼〉, 𝐼〉}〉} | |
2 | 1 | grp1 12827 | . . . 4 ⊢ (𝐼 ∈ 𝑉 → 𝑀 ∈ Grp) |
3 | eqid 2171 | . . . . 5 ⊢ (Base‘𝑀) = (Base‘𝑀) | |
4 | eqid 2171 | . . . . 5 ⊢ (invg‘𝑀) = (invg‘𝑀) | |
5 | 3, 4 | grpinvf 12772 | . . . 4 ⊢ (𝑀 ∈ Grp → (invg‘𝑀):(Base‘𝑀)⟶(Base‘𝑀)) |
6 | 2, 5 | syl 14 | . . 3 ⊢ (𝐼 ∈ 𝑉 → (invg‘𝑀):(Base‘𝑀)⟶(Base‘𝑀)) |
7 | snexg 4171 | . . . . 5 ⊢ (𝐼 ∈ 𝑉 → {𝐼} ∈ V) | |
8 | opexg 4214 | . . . . . . . 8 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐼 ∈ 𝑉) → 〈𝐼, 𝐼〉 ∈ V) | |
9 | 8 | anidms 395 | . . . . . . 7 ⊢ (𝐼 ∈ 𝑉 → 〈𝐼, 𝐼〉 ∈ V) |
10 | opexg 4214 | . . . . . . 7 ⊢ ((〈𝐼, 𝐼〉 ∈ V ∧ 𝐼 ∈ 𝑉) → 〈〈𝐼, 𝐼〉, 𝐼〉 ∈ V) | |
11 | 9, 10 | mpancom 420 | . . . . . 6 ⊢ (𝐼 ∈ 𝑉 → 〈〈𝐼, 𝐼〉, 𝐼〉 ∈ V) |
12 | snexg 4171 | . . . . . 6 ⊢ (〈〈𝐼, 𝐼〉, 𝐼〉 ∈ V → {〈〈𝐼, 𝐼〉, 𝐼〉} ∈ V) | |
13 | 11, 12 | syl 14 | . . . . 5 ⊢ (𝐼 ∈ 𝑉 → {〈〈𝐼, 𝐼〉, 𝐼〉} ∈ V) |
14 | 1 | grpbaseg 12530 | . . . . 5 ⊢ (({𝐼} ∈ V ∧ {〈〈𝐼, 𝐼〉, 𝐼〉} ∈ V) → {𝐼} = (Base‘𝑀)) |
15 | 7, 13, 14 | syl2anc 409 | . . . 4 ⊢ (𝐼 ∈ 𝑉 → {𝐼} = (Base‘𝑀)) |
16 | 15, 15 | feq23d 5345 | . . 3 ⊢ (𝐼 ∈ 𝑉 → ((invg‘𝑀):{𝐼}⟶{𝐼} ↔ (invg‘𝑀):(Base‘𝑀)⟶(Base‘𝑀))) |
17 | 6, 16 | mpbird 166 | . 2 ⊢ (𝐼 ∈ 𝑉 → (invg‘𝑀):{𝐼}⟶{𝐼}) |
18 | fsng 5673 | . . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐼 ∈ 𝑉) → ((invg‘𝑀):{𝐼}⟶{𝐼} ↔ (invg‘𝑀) = {〈𝐼, 𝐼〉})) | |
19 | 18 | anidms 395 | . . 3 ⊢ (𝐼 ∈ 𝑉 → ((invg‘𝑀):{𝐼}⟶{𝐼} ↔ (invg‘𝑀) = {〈𝐼, 𝐼〉})) |
20 | simpr 109 | . . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ (invg‘𝑀) = {〈𝐼, 𝐼〉}) → (invg‘𝑀) = {〈𝐼, 𝐼〉}) | |
21 | restidsing 4948 | . . . . . . 7 ⊢ ( I ↾ {𝐼}) = ({𝐼} × {𝐼}) | |
22 | xpsng 5675 | . . . . . . . 8 ⊢ ((𝐼 ∈ 𝑉 ∧ 𝐼 ∈ 𝑉) → ({𝐼} × {𝐼}) = {〈𝐼, 𝐼〉}) | |
23 | 22 | anidms 395 | . . . . . . 7 ⊢ (𝐼 ∈ 𝑉 → ({𝐼} × {𝐼}) = {〈𝐼, 𝐼〉}) |
24 | 21, 23 | eqtr2id 2217 | . . . . . 6 ⊢ (𝐼 ∈ 𝑉 → {〈𝐼, 𝐼〉} = ( I ↾ {𝐼})) |
25 | 24 | adantr 274 | . . . . 5 ⊢ ((𝐼 ∈ 𝑉 ∧ (invg‘𝑀) = {〈𝐼, 𝐼〉}) → {〈𝐼, 𝐼〉} = ( I ↾ {𝐼})) |
26 | 20, 25 | eqtrd 2204 | . . . 4 ⊢ ((𝐼 ∈ 𝑉 ∧ (invg‘𝑀) = {〈𝐼, 𝐼〉}) → (invg‘𝑀) = ( I ↾ {𝐼})) |
27 | 26 | ex 114 | . . 3 ⊢ (𝐼 ∈ 𝑉 → ((invg‘𝑀) = {〈𝐼, 𝐼〉} → (invg‘𝑀) = ( I ↾ {𝐼}))) |
28 | 19, 27 | sylbid 149 | . 2 ⊢ (𝐼 ∈ 𝑉 → ((invg‘𝑀):{𝐼}⟶{𝐼} → (invg‘𝑀) = ( I ↾ {𝐼}))) |
29 | 17, 28 | mpd 13 | 1 ⊢ (𝐼 ∈ 𝑉 → (invg‘𝑀) = ( I ↾ {𝐼})) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 ↔ wb 104 = wceq 1349 ∈ wcel 2142 Vcvv 2731 {csn 3584 {cpr 3585 〈cop 3587 I cid 4274 × cxp 4610 ↾ cres 4614 ⟶wf 5196 ‘cfv 5200 ndxcnx 12417 Basecbs 12420 +gcplusg 12484 Grpcgrp 12730 invgcminusg 12731 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 610 ax-in2 611 ax-io 705 ax-5 1441 ax-7 1442 ax-gen 1443 ax-ie1 1487 ax-ie2 1488 ax-8 1498 ax-10 1499 ax-11 1500 ax-i12 1501 ax-bndl 1503 ax-4 1504 ax-17 1520 ax-i9 1524 ax-ial 1528 ax-i5r 1529 ax-13 2144 ax-14 2145 ax-ext 2153 ax-coll 4105 ax-sep 4108 ax-pow 4161 ax-pr 4195 ax-un 4419 ax-setind 4522 ax-cnex 7869 ax-resscn 7870 ax-1cn 7871 ax-1re 7872 ax-icn 7873 ax-addcl 7874 ax-addrcl 7875 ax-mulcl 7876 ax-addcom 7878 ax-addass 7880 ax-i2m1 7883 ax-0lt1 7884 ax-0id 7886 ax-rnegex 7887 ax-pre-ltirr 7890 ax-pre-ltadd 7894 |
This theorem depends on definitions: df-bi 116 df-3an 976 df-tru 1352 df-fal 1355 df-nf 1455 df-sb 1757 df-eu 2023 df-mo 2024 df-clab 2158 df-cleq 2164 df-clel 2167 df-nfc 2302 df-ne 2342 df-nel 2437 df-ral 2454 df-rex 2455 df-reu 2456 df-rmo 2457 df-rab 2458 df-v 2733 df-sbc 2957 df-csb 3051 df-dif 3124 df-un 3126 df-in 3128 df-ss 3135 df-nul 3416 df-pw 3569 df-sn 3590 df-pr 3591 df-op 3593 df-uni 3798 df-int 3833 df-iun 3876 df-br 3991 df-opab 4052 df-mpt 4053 df-id 4279 df-xp 4618 df-rel 4619 df-cnv 4620 df-co 4621 df-dm 4622 df-rn 4623 df-res 4624 df-ima 4625 df-iota 5162 df-fun 5202 df-fn 5203 df-f 5204 df-f1 5205 df-fo 5206 df-f1o 5207 df-fv 5208 df-riota 5813 df-ov 5860 df-pnf 7960 df-mnf 7961 df-ltxr 7963 df-inn 8883 df-2 8941 df-ndx 12423 df-slot 12424 df-base 12426 df-plusg 12497 df-0g 12620 df-mgm 12632 df-sgrp 12665 df-mnd 12675 df-grp 12733 df-minusg 12734 |
This theorem is referenced by: (None) |
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