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Related theorems Unicode version |
| Description: A triple of classes exists. |
| Ref | Expression |
|---|---|
| tpex |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-tp 2405 |
. 2
| |
| 2 | prex 2771 |
. . 3
| |
| 3 | snex 2740 |
. . 3
| |
| 4 | 2, 3 | unex 2863 |
. 2
|
| 5 | 1, 4 | eqeltr 1536 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: fr3nr 2916 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-10 963 ax-11 964 ax-12 965 ax-13 966 ax-14 967 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-sep 2693 ax-pow 2732 ax-pr 2769 ax-un 2857 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-ex 978 df-sb 1168 df-eu 1375 df-mo 1376 df-clab 1457 df-cleq 1462 df-clel 1465 df-ne 1579 df-v 1803 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-nul 2271 df-pw 2392 df-sn 2402 df-pr 2403 df-tp 2405 df-uni 2494 |