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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 4581 |
. 2
|
| 4 | 3 | elexd 2815 |
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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2203 ax-14 2204 ax-ext 2212 ax-sep 4208 ax-pr 4301 ax-un 4532 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1810 df-clab 2217 df-cleq 2223 df-clel 2226 df-nfc 2362 df-rex 2515 df-rab 2518 df-v 2803 df-un 3203 df-in 3205 df-ss 3212 df-if 3605 df-pw 3655 df-sn 3676 df-pr 3677 df-uni 3895 |
| This theorem is referenced by: ifexg 4584 ccatlen 11181 ccatvalfn 11187 ccatalpha 11199 swrdval 11238 pfxval 11264 fnpfx 11267 gsumfzval 13497 vtxvalg 15896 iedgvalg 15897 vtxex 15898 iedgex 15899 edgvalg 15939 |
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