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Mirrors > Home > ILE Home > Th. List > 1ex | Unicode version |
Description: 1 is a set. Common special case. (Contributed by David A. Wheeler, 7-Jul-2016.) |
Ref | Expression |
---|---|
1ex |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1cn 7825 | . 2 | |
2 | 1 | elexi 2724 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 2128 cvv 2712 cc 7730 c1 7733 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1427 ax-gen 1429 ax-ie1 1473 ax-ie2 1474 ax-8 1484 ax-4 1490 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-ext 2139 ax-1cn 7825 |
This theorem depends on definitions: df-bi 116 df-sb 1743 df-clab 2144 df-cleq 2150 df-clel 2153 df-v 2714 |
This theorem is referenced by: nn1suc 8852 nn0ind-raph 9281 fzprval 9984 fztpval 9985 m1expcl2 10441 1exp 10448 facnn 10601 fac0 10602 prhash2ex 10683 prodf1f 11440 fprodntrivap 11481 prod1dc 11483 fprodssdc 11487 ege2le3 11568 1nprm 11991 dvexp 13086 dvef 13099 2o01f 13579 iswomni0 13633 |
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