Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > necon2bd | Unicode version |
Description: Contrapositive inference for inequality. (Contributed by NM, 13-Apr-2007.) |
Ref | Expression |
---|---|
necon2bd.1 |
Ref | Expression |
---|---|
necon2bd |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | necon2bd.1 | . . 3 | |
2 | df-ne 2307 | . . 3 | |
3 | 1, 2 | syl6ib 160 | . 2 |
4 | 3 | con2d 613 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wceq 1331 wne 2306 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-in1 603 ax-in2 604 |
This theorem depends on definitions: df-bi 116 df-ne 2307 |
This theorem is referenced by: disjiun 3919 map0g 6575 nneo 9147 zeo2 9150 bezoutr1 11710 coprm 11811 sqrt2irr 11829 dfphi2 11885 |
Copyright terms: Public domain | W3C validator |