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Mirrors > Home > ILE Home > Th. List > ecase23d | Unicode version |
Description: Variation of ecased 1308 with three disjuncts instead of two. (Contributed by NM, 22-Apr-1994.) (Revised by Jim Kingdon, 9-Dec-2017.) |
Ref | Expression |
---|---|
ecase23d.1 |
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ecase23d.2 |
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ecase23d.3 |
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Ref | Expression |
---|---|
ecase23d |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ecase23d.1 |
. 2
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2 | ecase23d.2 |
. . 3
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3 | ecase23d.3 |
. . . 4
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4 | df-3or 944 |
. . . 4
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5 | 3, 4 | sylib 121 |
. . 3
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6 | 2, 5 | ecased 1308 |
. 2
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7 | 1, 6 | ecased 1308 |
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-ia2 106 ax-ia3 107 ax-in2 587 ax-io 681 |
This theorem depends on definitions: df-bi 116 df-3or 944 |
This theorem is referenced by: iseqf1olemklt 10145 xrmaxiflemcl 10900 xrmaxifle 10901 xrmaxiflemab 10902 xrmaxiflemlub 10903 ennnfonelemex 11766 |
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