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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1cn 7922 |
. 2
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2 | 1 | elexi 2764 |
1
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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 1458 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-ext 2171 ax-1cn 7922 |
This theorem depends on definitions: df-bi 117 df-sb 1774 df-clab 2176 df-cleq 2182 df-clel 2185 df-v 2754 |
This theorem is referenced by: nn1suc 8956 nn0ind-raph 9388 fzprval 10100 fztpval 10101 m1expcl2 10560 1exp 10567 facnn 10725 fac0 10726 prhash2ex 10807 prodf1f 11569 fprodntrivap 11610 prod1dc 11612 fprodssdc 11616 ege2le3 11697 1nprm 12132 pcmpt 12359 dvexp 14559 dvef 14572 lgsdir2lem3 14815 2o01f 15131 iswomni0 15184 |
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