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| Mirrors > Home > ILE Home > Th. List > sseq1d | Unicode version | ||
| Description: An equality deduction for the subclass relationship. (Contributed by NM, 14-Aug-1994.) |
| Ref | Expression |
|---|---|
| sseq1d.1 |
|
| Ref | Expression |
|---|---|
| sseq1d |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | sseq1d.1 |
. 2
| |
| 2 | sseq1 3271 |
. 2
| |
| 3 | 1, 2 | syl 14 |
1
|
| Colors of variables: wff set class |
| This proof depends on syntax axioms:
|
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-11 1559 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-in 3226 df-ss 3233 |
| This theorem is used by: sseq12d 3279 eqsstrd 3284 snssgOLD 3851 ssiun2s 4056 treq 4235 onsucsssucexmid 4674 funimass1 5458 feq1 5516 sbcfg 5532 fvmptssdm 5790 fvimacnvi 5823 nnsucsssuc 6765 ereq1 6814 elpm2r 6940 fipwssg 7313 nnnninf 7466 ctssexmid 7490 rspssp 14880 iscnp 15349 iscnp4 15368 cnntr 15375 cnconst2 15383 cnptopresti 15388 cnptoprest 15389 txbas 15408 txcnp 15421 txdis 15427 txdis1cn 15428 blssps 15577 blss 15578 ssblex 15581 blin2 15582 metss2 15648 metrest 15656 metcnp3 15661 cnopnap 15761 limccl 15809 ellimc3apf 15810 ausgrumgrien 16509 ausgrusgrien 16510 eupth2lem3lem4fi 16812 |
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