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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 8018 |
. 2
| |
| 2 | 1 | elexi 2784 |
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 1470 ax-gen 1472 ax-ie1 1516 ax-ie2 1517 ax-8 1527 ax-4 1533 ax-17 1549 ax-i9 1553 ax-ial 1557 ax-ext 2187 ax-1cn 8018 |
| This theorem depends on definitions: df-bi 117 df-sb 1786 df-clab 2192 df-cleq 2198 df-clel 2201 df-v 2774 |
| This theorem is referenced by: nn1suc 9055 nn0ind-raph 9490 fzprval 10204 fztpval 10205 m1expcl2 10706 1exp 10713 facnn 10872 fac0 10873 prhash2ex 10954 prodf1f 11854 fprodntrivap 11895 prod1dc 11897 fprodssdc 11901 ege2le3 11982 1nprm 12436 pcmpt 12666 dvexp 15183 dvef 15199 lgsdir2lem3 15507 2o01f 15935 iswomni0 15994 |
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