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Mirrors > Home > NFE Home > Th. List > exiftruOLD | Unicode version |
Description: Obsolete proof of exiftru 1657 as of 9-Dec-2017. (Contributed by Wolf Lammen, 12-Nov-2017.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
exiftruOLD.1 |
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Ref | Expression |
---|---|
exiftruOLD |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | a9ev 1656 |
. . . 4
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2 | 1 | a1i 10 |
. . 3
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3 | 2 | 19.35ri 1602 |
. 2
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4 | exiftruOLD.1 |
. . . 4
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5 | id 19 |
. . . 4
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
6 | 4, 5 | 2th 230 |
. . 3
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
7 | 6 | exbii 1582 |
. 2
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8 | 3, 7 | mpbir 200 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-9 1654 |
This theorem depends on definitions: df-bi 177 df-an 360 df-ex 1542 |
This theorem is referenced by: (None) |
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