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Mirrors > Home > ILE Home > Th. List > ablsubsub4 | GIF version |
Description: Law for double subtraction. (Contributed by NM, 7-Apr-2015.) |
Ref | Expression |
---|---|
ablsubadd.b | ⊢ 𝐵 = (Base‘𝐺) |
ablsubadd.p | ⊢ + = (+g‘𝐺) |
ablsubadd.m | ⊢ − = (-g‘𝐺) |
ablsubsub.g | ⊢ (𝜑 → 𝐺 ∈ Abel) |
ablsubsub.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
ablsubsub.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
ablsubsub.z | ⊢ (𝜑 → 𝑍 ∈ 𝐵) |
Ref | Expression |
---|---|
ablsubsub4 | ⊢ (𝜑 → ((𝑋 − 𝑌) − 𝑍) = (𝑋 − (𝑌 + 𝑍))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ablsubsub.g | . . . . 5 ⊢ (𝜑 → 𝐺 ∈ Abel) | |
2 | ablgrp 12889 | . . . . 5 ⊢ (𝐺 ∈ Abel → 𝐺 ∈ Grp) | |
3 | 1, 2 | syl 14 | . . . 4 ⊢ (𝜑 → 𝐺 ∈ Grp) |
4 | ablsubsub.x | . . . 4 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
5 | ablsubsub.y | . . . 4 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
6 | ablsubadd.b | . . . . 5 ⊢ 𝐵 = (Base‘𝐺) | |
7 | ablsubadd.m | . . . . 5 ⊢ − = (-g‘𝐺) | |
8 | 6, 7 | grpsubcl 12809 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋 − 𝑌) ∈ 𝐵) |
9 | 3, 4, 5, 8 | syl3anc 1238 | . . 3 ⊢ (𝜑 → (𝑋 − 𝑌) ∈ 𝐵) |
10 | ablsubsub.z | . . 3 ⊢ (𝜑 → 𝑍 ∈ 𝐵) | |
11 | ablsubadd.p | . . . 4 ⊢ + = (+g‘𝐺) | |
12 | eqid 2175 | . . . 4 ⊢ (invg‘𝐺) = (invg‘𝐺) | |
13 | 6, 11, 12, 7 | grpsubval 12779 | . . 3 ⊢ (((𝑋 − 𝑌) ∈ 𝐵 ∧ 𝑍 ∈ 𝐵) → ((𝑋 − 𝑌) − 𝑍) = ((𝑋 − 𝑌) + ((invg‘𝐺)‘𝑍))) |
14 | 9, 10, 13 | syl2anc 411 | . 2 ⊢ (𝜑 → ((𝑋 − 𝑌) − 𝑍) = ((𝑋 − 𝑌) + ((invg‘𝐺)‘𝑍))) |
15 | 6, 12 | grpinvcl 12781 | . . . 4 ⊢ ((𝐺 ∈ Grp ∧ 𝑍 ∈ 𝐵) → ((invg‘𝐺)‘𝑍) ∈ 𝐵) |
16 | 3, 10, 15 | syl2anc 411 | . . 3 ⊢ (𝜑 → ((invg‘𝐺)‘𝑍) ∈ 𝐵) |
17 | 6, 11, 7, 1, 4, 5, 16 | ablsubsub 12917 | . 2 ⊢ (𝜑 → (𝑋 − (𝑌 − ((invg‘𝐺)‘𝑍))) = ((𝑋 − 𝑌) + ((invg‘𝐺)‘𝑍))) |
18 | 6, 11, 7, 12, 3, 5, 10 | grpsubinv 12802 | . . 3 ⊢ (𝜑 → (𝑌 − ((invg‘𝐺)‘𝑍)) = (𝑌 + 𝑍)) |
19 | 18 | oveq2d 5881 | . 2 ⊢ (𝜑 → (𝑋 − (𝑌 − ((invg‘𝐺)‘𝑍))) = (𝑋 − (𝑌 + 𝑍))) |
20 | 14, 17, 19 | 3eqtr2d 2214 | 1 ⊢ (𝜑 → ((𝑋 − 𝑌) − 𝑍) = (𝑋 − (𝑌 + 𝑍))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1353 ∈ wcel 2146 ‘cfv 5208 (class class class)co 5865 Basecbs 12428 +gcplusg 12492 Grpcgrp 12738 invgcminusg 12739 -gcsg 12740 Abelcabl 12885 |
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 df-cmn 12886 df-abl 12887 |
This theorem is referenced by: ablsub32 12921 ablnnncan 12922 |
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