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| Description: Principle of identity with antecedent. |
| Ref | Expression |
|---|---|
| biidd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | biid 187 |
. 2
| |
| 2 | 1 | a1i 8 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: 3anbi12d 1169 3anbi13d 1170 3anbi23d 1171 3anbi1d 1172 3anbi2d 1173 3anbi3d 1174 sb6x 1553 ax11 1589 sbidmOLD 1628 a16g 1653 a16gOLD 1654 ax11indalem 1759 ax11inda2ALT 1760 moeq3 2432 euxfr2 2437 sbcgf 2520 copsexg 3537 soeq1 3608 ordtri3or 3691 reuxfr2d 3844 reuxfr2 3845 weinxp 4059 tz6.12-2 4696 oprabval6g 4962 eloprabi 5060 fparlem3 5083 fparlem4 5084 trsbc 5843 aceq1 5891 aceq2 5893 axpowndlem4 6104 axpownd 6105 axinfndlem1 6109 axacndlem4 6114 ltsopr 6288 brtxp 14067 altdftru 14283 supdef 14604 istoset2 14628 isseg1 15304 isseg2 15305 isplibg4a 15315 isplibg4b 15317 oprabvalg 15706 oprpiece1res1 15880 oprpiece1res2 15881 tlmbrf 15905 pcorev 16087 trsbcVD 16701 elstrscaf 16716 poslem 16774 islvec 17188 |
| 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 |