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Mirrors > Home > NFE Home > Th. List > 19.43OLD | Unicode version |
Description: Obsolete proof of 19.43 1605 as of 3-May-2016. Leave this in for the example on the mmrecent.html page. (Contributed by NM, 5-Aug-1993.) (Proof modification is discouraged.) (New usage is discouraged.) |
Ref | Expression |
---|---|
19.43OLD |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ioran 476 |
. . . . 5
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2 | 1 | albii 1566 |
. . . 4
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3 | 19.26 1593 |
. . . 4
![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() | |
4 | alnex 1543 |
. . . . 5
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5 | alnex 1543 |
. . . . 5
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6 | 4, 5 | anbi12i 678 |
. . . 4
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7 | 2, 3, 6 | 3bitri 262 |
. . 3
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8 | 7 | notbii 287 |
. 2
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9 | df-ex 1542 |
. 2
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10 | oran 482 |
. 2
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11 | 8, 9, 10 | 3bitr4i 268 |
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 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-ex 1542 |
This theorem is referenced by: (None) |
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