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Mirrors > Home > ILE Home > Th. List > anbi12i | GIF version |
Description: Conjoin both sides of two equivalences. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
anbi12.1 | ⊢ (𝜑 ↔ 𝜓) |
anbi12.2 | ⊢ (𝜒 ↔ 𝜃) |
Ref | Expression |
---|---|
anbi12i | ⊢ ((𝜑 ∧ 𝜒) ↔ (𝜓 ∧ 𝜃)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | anbi12.1 | . . 3 ⊢ (𝜑 ↔ 𝜓) | |
2 | 1 | anbi1i 453 | . 2 ⊢ ((𝜑 ∧ 𝜒) ↔ (𝜓 ∧ 𝜒)) |
3 | anbi12.2 | . . 3 ⊢ (𝜒 ↔ 𝜃) | |
4 | 3 | anbi2i 452 | . 2 ⊢ ((𝜓 ∧ 𝜒) ↔ (𝜓 ∧ 𝜃)) |
5 | 2, 4 | bitri 183 | 1 ⊢ ((𝜑 ∧ 𝜒) ↔ (𝜓 ∧ 𝜃)) |
Colors of variables: wff set class |
Syntax hints: ∧ wa 103 ↔ wb 104 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: anbi12ci 456 ordir 806 orddi 809 dcan 918 3anbi123i 1170 an6 1299 xorcom 1366 trubifal 1394 truxortru 1397 truxorfal 1398 falxortru 1399 falxorfal 1400 nford 1546 nfand 1547 sbequ8 1819 sbanv 1861 sban 1926 sbbi 1930 sbnf2 1954 eu1 2022 2exeu 2089 2eu4 2090 sbabel 2305 neanior 2393 rexeqbii 2446 r19.26m 2561 reean 2597 reu5 2641 reu2 2867 reu3 2869 eqss 3107 unss 3245 ralunb 3252 ssin 3293 undi 3319 difundi 3323 indifdir 3327 inab 3339 difab 3340 reuss2 3351 reupick 3355 raaan 3464 prss 3671 tpss 3680 prsspw 3687 prneimg 3696 uniin 3751 intun 3797 intpr 3798 disjiun 3919 brin 3975 brdif 3976 ssext 4138 pweqb 4140 opthg2 4156 copsex4g 4164 opelopabsb 4177 eqopab2b 4196 pwin 4199 pofun 4229 wetrep 4277 ordwe 4485 wessep 4487 reg3exmidlemwe 4488 elxp3 4588 soinxp 4604 relun 4651 inopab 4666 difopab 4667 inxp 4668 opelco2g 4702 cnvco 4719 dmin 4742 intasym 4918 asymref 4919 cnvdif 4940 xpm 4955 xp11m 4972 dfco2 5033 relssdmrn 5054 cnvpom 5076 xpcom 5080 dffun4 5129 dffun4f 5134 funun 5162 funcnveq 5181 fun11 5185 fununi 5186 imadif 5198 imainlem 5199 imain 5200 fnres 5234 fnopabg 5241 fun 5290 fin 5304 dff1o2 5365 brprcneu 5407 fsn 5585 dff1o6 5670 isotr 5710 brabvv 5810 eqoprab2b 5822 dfoprab3 6082 poxp 6122 cnvoprab 6124 f1od2 6125 brtpos2 6141 tfrlem7 6207 dfer2 6423 eqer 6454 iinerm 6494 brecop 6512 eroveu 6513 erovlem 6514 oviec 6528 mapval2 6565 ixpin 6610 xpcomco 6713 xpassen 6717 ssenen 6738 sbthlemi10 6847 infmoti 6908 dfmq0qs 7230 dfplq0qs 7231 enq0enq 7232 enq0tr 7235 npsspw 7272 nqprdisj 7345 ltnqpr 7394 ltnqpri 7395 ltexprlemdisj 7407 addcanprg 7417 recexprlemdisj 7431 caucvgprprlemval 7489 addsrpr 7546 mulsrpr 7547 mulgt0sr 7579 addcnsr 7635 mulcnsr 7636 ltresr 7640 addvalex 7645 axcnre 7682 axpre-suploc 7703 supinfneg 9383 infsupneg 9384 xrnemnf 9557 xrnepnf 9558 elfzuzb 9793 fzass4 9835 hashfacen 10572 rexanre 10985 cbvprod 11320 infssuzex 11631 isprm3 11788 tgval2 12209 epttop 12248 cnnei 12390 txuni2 12414 txbas 12416 txdis1cn 12436 xmeterval 12593 dedekindicc 12769 bj-stan 12944 nnti 13180 |
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