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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 8053 |
. 2
| |
| 2 | 1 | elexi 2789 |
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-5 1471 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-ext 2189 ax-1cn 8053 |
| This theorem depends on definitions: df-bi 117 df-sb 1787 df-clab 2194 df-cleq 2200 df-clel 2203 df-v 2778 |
| This theorem is referenced by: nn1suc 9090 nn0ind-raph 9525 fzprval 10239 fztpval 10240 m1expcl2 10743 1exp 10750 facnn 10909 fac0 10910 prhash2ex 10991 prodf1f 11969 fprodntrivap 12010 prod1dc 12012 fprodssdc 12016 ege2le3 12097 1nprm 12551 pcmpt 12781 dvexp 15298 dvef 15314 lgsdir2lem3 15622 2o01f 16131 iswomni0 16192 |
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