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Mirrors > Home > ILE Home > Th. List > 19.9ht | Unicode version |
Description: A closed version of one direction of 19.9 1591. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
19.9ht |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 19 |
. . 3
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2 | 1 | ax-gen 1393 |
. 2
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3 | 19.23ht 1441 |
. 2
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4 | 2, 3 | mpbii 147 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 105 ax-gen 1393 ax-ie2 1438 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: 19.9t 1589 19.9h 1590 19.9hd 1608 |
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