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Mirrors > Home > ILE Home > Th. List > grpnpcan | GIF version |
Description: Cancellation law for subtraction (npcan 8140 analog). (Contributed by NM, 19-Apr-2014.) |
Ref | Expression |
---|---|
grpsubadd.b | ⊢ 𝐵 = (Base‘𝐺) |
grpsubadd.p | ⊢ + = (+g‘𝐺) |
grpsubadd.m | ⊢ − = (-g‘𝐺) |
Ref | Expression |
---|---|
grpnpcan | ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 − 𝑌) + 𝑌) = 𝑋) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | grpsubadd.b | . . . . . 6 ⊢ 𝐵 = (Base‘𝐺) | |
2 | eqid 2175 | . . . . . 6 ⊢ (invg‘𝐺) = (invg‘𝐺) | |
3 | 1, 2 | grpinvcl 12781 | . . . . 5 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘𝑌) ∈ 𝐵) |
4 | 3 | 3adant2 1016 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘𝑌) ∈ 𝐵) |
5 | grpsubadd.p | . . . . 5 ⊢ + = (+g‘𝐺) | |
6 | 1, 5 | grpcl 12746 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ ((invg‘𝐺)‘𝑌) ∈ 𝐵) → (𝑋 + ((invg‘𝐺)‘𝑌)) ∈ 𝐵) |
7 | 4, 6 | syld3an3 1283 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + ((invg‘𝐺)‘𝑌)) ∈ 𝐵) |
8 | grpsubadd.m | . . . 4 ⊢ − = (-g‘𝐺) | |
9 | 1, 5, 2, 8 | grpsubval 12779 | . . 3 ⊢ (((𝑋 + ((invg‘𝐺)‘𝑌)) ∈ 𝐵 ∧ ((invg‘𝐺)‘𝑌) ∈ 𝐵) → ((𝑋 + ((invg‘𝐺)‘𝑌)) − ((invg‘𝐺)‘𝑌)) = ((𝑋 + ((invg‘𝐺)‘𝑌)) + ((invg‘𝐺)‘((invg‘𝐺)‘𝑌)))) |
10 | 7, 4, 9 | syl2anc 411 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 + ((invg‘𝐺)‘𝑌)) − ((invg‘𝐺)‘𝑌)) = ((𝑋 + ((invg‘𝐺)‘𝑌)) + ((invg‘𝐺)‘((invg‘𝐺)‘𝑌)))) |
11 | 1, 5, 8 | grppncan 12820 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ ((invg‘𝐺)‘𝑌) ∈ 𝐵) → ((𝑋 + ((invg‘𝐺)‘𝑌)) − ((invg‘𝐺)‘𝑌)) = 𝑋) |
12 | 4, 11 | syld3an3 1283 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 + ((invg‘𝐺)‘𝑌)) − ((invg‘𝐺)‘𝑌)) = 𝑋) |
13 | 1, 5, 2, 8 | grpsubval 12779 | . . . . 5 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋 + ((invg‘𝐺)‘𝑌))) |
14 | 13 | 3adant1 1015 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) = (𝑋 + ((invg‘𝐺)‘𝑌))) |
15 | 14 | eqcomd 2181 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 + ((invg‘𝐺)‘𝑌)) = (𝑋 − 𝑌)) |
16 | 1, 2 | grpinvinv 12796 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑌) |
17 | 16 | 3adant2 1016 | . . 3 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((invg‘𝐺)‘((invg‘𝐺)‘𝑌)) = 𝑌) |
18 | 15, 17 | oveq12d 5883 | . 2 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 + ((invg‘𝐺)‘𝑌)) + ((invg‘𝐺)‘((invg‘𝐺)‘𝑌))) = ((𝑋 − 𝑌) + 𝑌)) |
19 | 10, 12, 18 | 3eqtr3rd 2217 | 1 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((𝑋 − 𝑌) + 𝑌) = 𝑋) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ w3a 978 = wceq 1353 ∈ wcel 2146 ‘cfv 5208 (class class class)co 5865 Basecbs 12428 +gcplusg 12492 Grpcgrp 12738 invgcminusg 12739 -gcsg 12740 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1445 ax-7 1446 ax-gen 1447 ax-ie1 1491 ax-ie2 1492 ax-8 1502 ax-10 1503 ax-11 1504 ax-i12 1505 ax-bndl 1507 ax-4 1508 ax-17 1524 ax-i9 1528 ax-ial 1532 ax-i5r 1533 ax-13 2148 ax-14 2149 ax-ext 2157 ax-coll 4113 ax-sep 4116 ax-pow 4169 ax-pr 4203 ax-un 4427 ax-setind 4530 ax-cnex 7877 ax-resscn 7878 ax-1re 7880 ax-addrcl 7883 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1459 df-sb 1761 df-eu 2027 df-mo 2028 df-clab 2162 df-cleq 2168 df-clel 2171 df-nfc 2306 df-ne 2346 df-ral 2458 df-rex 2459 df-reu 2460 df-rmo 2461 df-rab 2462 df-v 2737 df-sbc 2961 df-csb 3056 df-dif 3129 df-un 3131 df-in 3133 df-ss 3140 df-pw 3574 df-sn 3595 df-pr 3596 df-op 3598 df-uni 3806 df-int 3841 df-iun 3884 df-br 3999 df-opab 4060 df-mpt 4061 df-id 4287 df-xp 4626 df-rel 4627 df-cnv 4628 df-co 4629 df-dm 4630 df-rn 4631 df-res 4632 df-ima 4633 df-iota 5170 df-fun 5210 df-fn 5211 df-f 5212 df-f1 5213 df-fo 5214 df-f1o 5215 df-fv 5216 df-riota 5821 df-ov 5868 df-oprab 5869 df-mpo 5870 df-1st 6131 df-2nd 6132 df-inn 8891 df-2 8949 df-ndx 12431 df-slot 12432 df-base 12434 df-plusg 12505 df-0g 12628 df-mgm 12640 df-sgrp 12673 df-mnd 12683 df-grp 12741 df-minusg 12742 df-sbg 12743 |
This theorem is referenced by: grpsubsub4 12822 grpnpncan 12824 grpnnncan2 12826 dfgrp3m 12828 ablpncan3 12916 |
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