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Mirrors > Home > ILE Home > Th. List > eleq1d | Unicode version |
Description: Deduction from equality to equivalence of membership. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
eleq1d.1 |
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Ref | Expression |
---|---|
eleq1d |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eleq1d.1 |
. 2
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2 | eleq1 2240 |
. 2
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3 | 1, 2 | syl 14 |
1
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