Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > 3ex | Unicode version |
Description: 3 is a set (common case). (Contributed by David A. Wheeler, 8-Dec-2018.) |
Ref | Expression |
---|---|
3ex |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3cn 8953 | . 2 | |
2 | 1 | elexi 2742 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 2141 cvv 2730 cc 7772 c3 8930 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-11 1499 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-ext 2152 ax-resscn 7866 ax-1re 7868 ax-addrcl 7871 |
This theorem depends on definitions: df-bi 116 df-nf 1454 df-sb 1756 df-clab 2157 df-cleq 2163 df-clel 2166 df-v 2732 df-in 3127 df-ss 3134 df-2 8937 df-3 8938 |
This theorem is referenced by: fztpval 10039 lgsdir2lem3 13725 |
Copyright terms: Public domain | W3C validator |