Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > 19.9t | Unicode version |
Description: A closed version of 19.9 1608. (Contributed by NM, 5-Aug-1993.) (Revised by Mario Carneiro, 24-Sep-2016.) (Proof shortended by Wolf Lammen, 30-Dec-2017.) |
Ref | Expression |
---|---|
19.9t |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-nf 1422 | . . 3 | |
2 | 19.9ht 1605 | . . 3 | |
3 | 1, 2 | sylbi 120 | . 2 |
4 | 19.8a 1554 | . 2 | |
5 | 3, 4 | impbid1 141 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wal 1314 wnf 1421 wex 1453 |
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-gen 1410 ax-ie1 1454 ax-ie2 1455 ax-4 1472 |
This theorem depends on definitions: df-bi 116 df-nf 1422 |
This theorem is referenced by: 19.9d 1624 19.23t 1640 spimt 1699 exdistrfor 1756 sbequi 1795 sbft 1804 vtoclegft 2732 copsexg 4136 |
Copyright terms: Public domain | W3C validator |