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Mirrors > Home > HOLE Home > Th. List > con3d | Unicode version |
Description: A contraposition deduction. |
Ref | Expression |
---|---|
con3d.1 |
Ref | Expression |
---|---|
con3d |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | wnot 128 | . . 3 | |
2 | con3d.1 | . . . 4 | |
3 | 2 | ax-cb2 30 | . . 3 |
4 | 1, 3 | wc 45 | . 2 |
5 | 3 | notnot1 150 | . . 3 |
6 | 2, 5 | syl 16 | . 2 |
7 | 4, 6 | con2d 151 | 1 |
Colors of variables: type var term |
Syntax hints: hb 3 kc 5 kct 10 wffMMJ2 11 tne 110 |
This theorem was proved from axioms: ax-syl 15 ax-jca 17 ax-simpl 20 ax-simpr 21 ax-id 24 ax-trud 26 ax-cb1 29 ax-cb2 30 ax-refl 39 ax-eqmp 42 ax-ded 43 ax-ceq 46 ax-beta 60 ax-distrc 61 ax-leq 62 ax-distrl 63 ax-hbl1 93 ax-17 95 ax-inst 103 |
This theorem depends on definitions: df-ov 65 df-al 116 df-fal 117 df-an 118 df-im 119 df-not 120 |
This theorem is referenced by: alnex 174 |
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