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Mirrors > Home > ILE Home > Th. List > con3 | Unicode version |
Description: Contraposition. Theorem *2.16 of [WhiteheadRussell] p. 103. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Wolf Lammen, 13-Feb-2013.) |
Ref | Expression |
---|---|
con3 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 19 |
. 2
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2 | 1 | con3d 621 |
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-in1 604 ax-in2 605 |
This theorem is referenced by: mtt 675 annimim 676 pm3.37 679 const 838 con34bdc 857 hbnt 1632 ralf0 3471 ltleletr 7870 ltnsym 7874 bj-nnsn 13116 bj-nnclavius 13121 |
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