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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 8185 |
. 2
| |
| 2 | 1 | elexi 2816 |
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 1496 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-ext 2213 ax-1cn 8185 |
| This theorem depends on definitions: df-bi 117 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-v 2805 |
| This theorem is referenced by: nn1suc 9221 nn0ind-raph 9658 fzprval 10379 fztpval 10380 m1expcl2 10886 1exp 10893 facnn 11052 fac0 11053 prhash2ex 11136 prodf1f 12184 fprodntrivap 12225 prod1dc 12227 fprodssdc 12231 ege2le3 12312 1nprm 12766 pcmpt 12996 dvexp 15522 dvef 15538 lgsdir2lem3 15849 2wlklem 16317 konigsberglem4 16432 konigsberglem5 16433 2o01f 16714 iswomni0 16784 |
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