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| Description: Principle of identity with antecedent. |
| Ref | Expression |
|---|---|
| idd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 59 |
. 2
| |
| 2 | 1 | a1i 8 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: pm2.43d 65 pm2.63 428 anim1d 558 anim2d 559 orim1d 564 orim2d 565 dedlema 760 r19.36av 1752 r19.44av 1758 r19.45av 1759 reuss 2266 opthpr 2476 relop 3265 abfii4 4538 rankxplim3 4686 elnnz 6092 expeq0t 6517 expord2t 6535 0top 7577 opni3 7806 lmfexlem1 7891 grpnnncan2 8028 va1cnlem 8279 ipsubdir 8439 minveceu 8514 hmphsyma 10415 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-mp 7 |