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Mirrors > Home > MPE Home > Th. List > dmeq | Structured version Visualization version GIF version |
Description: Equality theorem for domain. (Contributed by NM, 11-Aug-1994.) |
Ref | Expression |
---|---|
dmeq | ⊢ (𝐴 = 𝐵 → dom 𝐴 = dom 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dmss 5245 | . . 3 ⊢ (𝐴 ⊆ 𝐵 → dom 𝐴 ⊆ dom 𝐵) | |
2 | dmss 5245 | . . 3 ⊢ (𝐵 ⊆ 𝐴 → dom 𝐵 ⊆ dom 𝐴) | |
3 | 1, 2 | anim12i 588 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴) → (dom 𝐴 ⊆ dom 𝐵 ∧ dom 𝐵 ⊆ dom 𝐴)) |
4 | eqss 3583 | . 2 ⊢ (𝐴 = 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐵 ⊆ 𝐴)) | |
5 | eqss 3583 | . 2 ⊢ (dom 𝐴 = dom 𝐵 ↔ (dom 𝐴 ⊆ dom 𝐵 ∧ dom 𝐵 ⊆ dom 𝐴)) | |
6 | 3, 4, 5 | 3imtr4i 280 | 1 ⊢ (𝐴 = 𝐵 → dom 𝐴 = dom 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ⊆ wss 3540 dom cdm 5038 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-br 4584 df-dm 5048 |
This theorem is referenced by: dmeqi 5247 dmeqd 5248 xpid11 5268 fneq1 5893 eqfnfv2 6220 nvof1o 6436 offval 6802 ofrfval 6803 offval3 7053 suppval 7184 smoeq 7334 tz7.44lem1 7388 tz7.44-2 7390 tz7.44-3 7391 ereq1 7636 fundmeng 7917 fseqenlem2 8731 dfac3 8827 dfac9 8841 dfac12lem1 8848 dfac12r 8851 ackbij2lem2 8945 ackbij2lem3 8946 r1om 8949 cfsmolem 8975 cfsmo 8976 dcomex 9152 axdc2lem 9153 axdc3lem2 9156 axdc3lem4 9158 ac7g 9179 ttukey2g 9221 fundmge2nop0 13129 s4dom 13514 relexp0g 13610 relexpsucnnr 13613 dfrtrcl2 13650 ello1 14094 elo1 14105 bpolylem 14618 bpolyval 14619 isoval 16248 istsr 17040 islindf 19970 decpmatval0 20388 pmatcollpw3lem 20407 ordtval 20803 dfac14 21231 fmval 21557 fmf 21559 blfvalps 21998 tmsval 22096 cfilfval 22870 caufval 22881 isibl 23338 elcpn 23503 iscgrg 25207 structvtxvallem 25697 uhgr0e 25737 incistruhgr 25746 isuhgra 25827 uhgrac 25834 uhgraeq12d 25836 isuslgra 25872 isusgra 25873 usgraeq12d 25891 wlks 26047 wlkcompim 26054 wlkelwrd 26058 ex-dm 26688 f1ocnt 28946 locfinreflem 29235 pstmval 29266 cntnevol 29618 omsval 29682 sitgval 29721 elprob 29798 cndprobval 29822 rrvmbfm 29831 bnj1385 30157 bnj1400 30160 bnj1014 30284 bnj1015 30285 bnj1326 30348 bnj1321 30349 bnj1491 30379 mrsubfval 30659 rdgprc0 30943 dfrdg2 30945 frrlem5e 31032 bdayval 31045 bdayfo 31074 nofulllem5 31105 brdomaing 31212 fwddifval 31439 fwddifnval 31440 filnetlem4 31546 cureq 32555 ismtyval 32769 isass 32815 isexid 32816 ismgmOLD 32819 aomclem6 36647 aomclem8 36649 dfac21 36654 rclexi 36941 rtrclex 36943 rtrclexi 36947 cnvrcl0 36951 dfrtrcl5 36955 dfrcl2 36985 gneispace2 37450 ssnnf1octb 38377 sge0val 39259 ismea 39344 caragenval 39383 isome 39384 issmflem 39613 resresdm 40319 ausgrusgri 40398 egrsubgr 40501 vtxdgfval 40683 vtxdg0e 40689 1egrvtxdg1 40725 eupth0 41382 fnxpdmdm 41558 offval0 42093 elbigo 42143 |
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