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| Mirrors > Home > ILE Home > Th. List > ifexd | Unicode version | ||
| Description: Existence of a conditional class (deduction form). (Contributed by BJ, 15-Aug-2024.) |
| Ref | Expression |
|---|---|
| ifexd.1 |
|
| ifexd.2 |
|
| Ref | Expression |
|---|---|
| ifexd |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ifexd.1 |
. . 3
| |
| 2 | ifexd.2 |
. . 3
| |
| 3 | 1, 2 | ifelpwund 4605 |
. 2
|
| 4 | 3 | elexd 2829 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-sep 4230 ax-pr 4324 ax-un 4556 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-rex 2528 df-rab 2531 df-v 2817 df-un 3217 df-in 3219 df-ss 3226 df-if 3623 df-pw 3673 df-sn 3697 df-pr 3698 df-uni 3917 |
| This theorem is referenced by: ifexg 4608 ccatlen 11291 ccatvalfn 11297 ccatalpha 11309 swrdval 11348 pfxval 11374 fnpfx 11377 gsumfzval 13625 vtxvalg 16060 iedgvalg 16061 vtxex 16062 iedgex 16063 edgvalg 16103 |
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