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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 445 | . 2 ⊢ ((𝜑 ∧ 𝜒) ↔ (𝜓 ∧ 𝜒)) |
3 | anbi12.2 | . . 3 ⊢ (𝜒 ↔ 𝜃) | |
4 | 3 | anbi2i 444 | . 2 ⊢ ((𝜓 ∧ 𝜒) ↔ (𝜓 ∧ 𝜃)) |
5 | 2, 4 | bitri 182 | 1 ⊢ ((𝜑 ∧ 𝜒) ↔ (𝜓 ∧ 𝜃)) |
Colors of variables: wff set class |
Syntax hints: ∧ wa 102 ↔ wb 103 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 |
This theorem depends on definitions: df-bi 115 |
This theorem is referenced by: anbi12ci 448 ordir 763 orddi 766 dcan 875 3anbi123i 1127 an6 1252 xorcom 1319 trubifal 1347 truxortru 1350 truxorfal 1351 falxortru 1352 falxorfal 1353 nford 1499 nfand 1500 sbequ8 1768 sbanv 1810 sban 1870 sbbi 1874 sbnf2 1898 eu1 1966 2exeu 2033 2eu4 2034 sbabel 2244 neanior 2332 rexeqbii 2379 r19.26m 2488 reean 2522 reu5 2566 reu2 2780 reu3 2782 eqss 3014 unss 3146 ralunb 3153 ssin 3188 undi 3212 difundi 3216 indifdir 3220 inab 3232 difab 3233 reuss2 3244 reupick 3248 raaan 3347 prss 3541 tpss 3550 prsspw 3557 prneimg 3566 uniin 3621 intun 3667 intpr 3668 brin 3832 brdif 3833 ssext 3976 pweqb 3978 opthg2 3994 copsex4g 4002 opelopabsb 4015 eqopab2b 4034 pwin 4037 pofun 4067 wetrep 4115 ordwe 4318 wessep 4320 reg3exmidlemwe 4321 elxp3 4412 soinxp 4428 relun 4472 inopab 4486 difopab 4487 inxp 4488 opelco2g 4521 cnvco 4538 dmin 4561 intasym 4729 asymref 4730 cnvdif 4750 xpm 4765 xp11m 4779 dfco2 4840 relssdmrn 4861 cnvpom 4880 xpcom 4884 dffun4 4933 dffun4f 4938 funun 4964 funcnveq 4982 fun11 4986 fununi 4987 imadif 4999 imainlem 5000 imain 5001 fnres 5035 fnopabg 5042 fun 5083 fin 5096 dff1o2 5151 brprcneu 5191 fsn 5356 dff1o6 5436 isotr 5476 brabvv 5571 eqoprab2b 5583 dfoprab3 5837 poxp 5873 cnvoprab 5875 f1od2 5876 brtpos2 5889 tfrlem7 5956 dfer2 6130 eqer 6161 iinerm 6201 brecop 6219 eroveu 6220 erovlem 6221 oviec 6235 xpcomco 6323 xpassen 6327 infmoti 6441 dfmq0qs 6619 dfplq0qs 6620 enq0enq 6621 enq0tr 6624 npsspw 6661 nqprdisj 6734 ltnqpr 6783 ltnqpri 6784 ltexprlemdisj 6796 addcanprg 6806 recexprlemdisj 6820 caucvgprprlemval 6878 addsrpr 6922 mulsrpr 6923 mulgt0sr 6954 addcnsr 7002 mulcnsr 7003 ltresr 7007 addvalex 7012 axcnre 7047 supinfneg 8683 infsupneg 8684 xrnemnf 8853 xrnepnf 8854 elfzuzb 9039 fzass4 9080 rexanre 10106 infssuzex 10345 isprm3 10500 |
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