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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 8020 |
. 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 8020 |
| 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 9057 nn0ind-raph 9492 fzprval 10206 fztpval 10207 m1expcl2 10708 1exp 10715 facnn 10874 fac0 10875 prhash2ex 10956 prodf1f 11887 fprodntrivap 11928 prod1dc 11930 fprodssdc 11934 ege2le3 12015 1nprm 12469 pcmpt 12699 dvexp 15216 dvef 15232 lgsdir2lem3 15540 2o01f 15968 iswomni0 16027 |
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