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Mirrors > Home > MPE Home > Th. List > Mathboxes > bj-subcom | Structured version Visualization version GIF version |
Description: A consequence of commutativity of multiplication. (Contributed by BJ, 6-Jun-2019.) |
Ref | Expression |
---|---|
bj-subcom.a | โข (๐ โ ๐ด โ โ) |
bj-subcom.b | โข (๐ โ ๐ต โ โ) |
Ref | Expression |
---|---|
bj-subcom | โข (๐ โ ((๐ด ยท ๐ต) โ (๐ต ยท ๐ด)) = 0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bj-subcom.a | . . 3 โข (๐ โ ๐ด โ โ) | |
2 | bj-subcom.b | . . 3 โข (๐ โ ๐ต โ โ) | |
3 | 1, 2 | mulcld 11262 | . 2 โข (๐ โ (๐ด ยท ๐ต) โ โ) |
4 | 1, 2 | mulcomd 11263 | . 2 โข (๐ โ (๐ด ยท ๐ต) = (๐ต ยท ๐ด)) |
5 | 3, 4 | subeq0bd 11668 | 1 โข (๐ โ ((๐ด ยท ๐ต) โ (๐ต ยท ๐ด)) = 0) |
Colors of variables: wff setvar class |
Syntax hints: โ wi 4 = wceq 1533 โ wcel 2098 (class class class)co 7414 โcc 11134 0cc0 11136 ยท cmul 11141 โ cmin 11472 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-sep 5292 ax-nul 5299 ax-pow 5357 ax-pr 5421 ax-un 7736 ax-resscn 11193 ax-1cn 11194 ax-icn 11195 ax-addcl 11196 ax-addrcl 11197 ax-mulcl 11198 ax-mulrcl 11199 ax-mulcom 11200 ax-addass 11201 ax-mulass 11202 ax-distr 11203 ax-i2m1 11204 ax-1ne0 11205 ax-1rid 11206 ax-rnegex 11207 ax-rrecex 11208 ax-cnre 11209 ax-pre-lttri 11210 ax-pre-lttrn 11211 ax-pre-ltadd 11212 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3769 df-csb 3885 df-dif 3942 df-un 3944 df-in 3946 df-ss 3956 df-nul 4317 df-if 4523 df-pw 4598 df-sn 4623 df-pr 4625 df-op 4629 df-uni 4902 df-br 5142 df-opab 5204 df-mpt 5225 df-id 5568 df-po 5582 df-so 5583 df-xp 5676 df-rel 5677 df-cnv 5678 df-co 5679 df-dm 5680 df-rn 5681 df-res 5682 df-ima 5683 df-iota 6493 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-er 8721 df-en 8961 df-dom 8962 df-sdom 8963 df-pnf 11278 df-mnf 11279 df-ltxr 11281 df-sub 11474 |
This theorem is referenced by: bj-bary1lem 36818 |
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