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Mirrors > Home > ILE Home > Th. List > pm4.14dc | Unicode version |
Description: Theorem *4.14 of [WhiteheadRussell] p. 117, given a decidability condition. (Contributed by Jim Kingdon, 24-Apr-2018.) |
Ref | Expression |
---|---|
pm4.14dc | DECID |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | con34bdc 765 | . . 3 DECID | |
2 | 1 | imbi2d 219 | . 2 DECID |
3 | impexp 250 | . 2 | |
4 | impexp 250 | . 2 | |
5 | 2, 3, 4 | 3bitr4g 212 | 1 DECID |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 97 wb 98 DECID wdc 742 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-in1 544 ax-in2 545 ax-io 630 |
This theorem depends on definitions: df-bi 110 df-dc 743 |
This theorem is referenced by: pm3.37dc 788 |
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