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| Description: Introduce an antecedent to both sides of a logical equivalence. |
| Ref | Expression |
|---|---|
| bi.a |
|
| Ref | Expression |
|---|---|
| imbi2i |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bi.a |
. . . 4
| |
| 2 | 1 | biimpi 168 |
. . 3
|
| 3 | 2 | imim2i 11 |
. 2
|
| 4 | 1 | biimpri 169 |
. . 3
|
| 5 | 4 | imim2i 11 |
. 2
|
| 6 | 3, 5 | impbii 174 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: imbi12i 205 iman 256 orbi2i 275 or12 278 pm4.14 379 pm4.15 380 pm4.78 381 pm4.79 382 anidmdbi 481 anass 487 ibibr 651 bibi2i 669 bibi2iOLD 670 pm5.32 706 pm5.6 752 nan 753 impexp3a 1292 19.35 1426 19.36 1429 sban 1607 sbhb 1714 2sb6 1726 2sb6rf 1729 eu1 1786 sbmo 1796 moabs 1811 moanim 1826 2eu6 1858 r2al 2136 r19.21t 2177 r19.35 2231 ralcom2 2244 ralcom2OLD 2245 reu2 2442 reu8 2448 ssconb 2738 ssin 2814 difin 2831 reldisj 2916 reldisjOLD 2917 inssdif0OLD 2941 ssundif 2955 pwpw0 3134 pwsnALT 3173 unissb 3208 dfiin2OLD 3288 ssiunOLD 3294 ssiin 3302 ssiinOLD 3303 axrep1 3429 dffr2 3627 dffr2OLD 3628 dfepfr 3640 dfepfrOLD 3641 ssrel 4075 dffr3 4297 asymref2OLD 4311 fun11 4480 dff13 4850 ordtypelem7 5690 inf2 5714 axinf2 5730 aceq1 5891 aceq0 5892 zfac 5907 ac6n 5919 kmlem14 5940 aceqkm 5943 zfcndrep 6118 zfcndac 6123 prime 7407 raluz2 7612 cau3iri 8167 clm1i 8337 climshfti 8364 climresi 8365 caucvgi 8423 islp2 9023 sncld 9064 lmbr2 9207 iscau2 9215 metcnp4 9248 bcthlem7 9283 nmobndseqi 9780 axgroth6 10137 axgroth4 10139 grothprim 10141 hausfillim 10303 cvnbtwn3 11860 elat2 11912 bnj24 12388 bnj37 12407 bnj47OLD 12418 bnj48OLD 12423 bnj55 12430 bnj220 12511 bnj614 12567 bnj856 12789 bnj859 12792 bnj861 12794 bnj877 12804 bnj901 12818 bnj979 12863 bnj997 12873 bnj1054 12891 bnj1059 12896 bnj1085 12907 bnj1086 12908 bnj1088 12910 bnj1130 12933 bnj1135 12935 bnj1166 12958 bnj1306 13049 bnj1310 13050 bnj1492 13161 bnj1533 13182 bnj119 13229 bnj121 13231 bnj124 13234 bnj130 13240 bnj153 13247 bnj207 13248 bnj611 13307 bnj965 13346 bnj1000 13364 bnj1008 13373 bnj1021 13380 bnj1047 13393 bnj1049 13394 bnj1062 13397 bnj1067 13399 bnj1070 13401 bnj1077 13405 bnj1090 13410 bnj1171 13439 bnj1172 13440 bnj1174 13442 bnj1284 13482 isprm2 13775 axinfprim 13790 dfon2lem9 13857 dffr4 13893 df3nandALT1 14146 df3nandALT2 14147 evpexun 14322 elicc3 15362 ordtypelem7OLD 15381 alexsublem3 15439 is1stc3 15469 neibastop2lem3 15521 ist0-2 15539 limfilcf 15587 flimfnfcls 15615 sbmoOLD 15654 caures 15852 pm10.541 16314 pm13.196a 16378 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 |
| This theorem depends on definitions: df-bi 164 |