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Mirrors > Home > MPE Home > Th. List > uneq12d | Structured version Visualization version Unicode version |
Description: Equality deduction for union of two classes. (Contributed by NM, 29-Sep-2004.) (Proof shortened by Andrew Salmon, 26-Jun-2011.) |
Ref | Expression |
---|---|
uneq1d.1 |
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uneq12d.2 |
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Ref | Expression |
---|---|
uneq12d |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uneq1d.1 |
. 2
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2 | uneq12d.2 |
. 2
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3 | uneq12 3583 |
. 2
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4 | 1, 2, 3 | syl2anc 667 |
1
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