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Mirrors > Home > MPE Home > Th. List > uneq12d | Structured version Visualization version Unicode version |
Description: Equality deduction for the union of two classes. (Contributed by NM, 29-Sep-2004.) (Proof shortened by Andrew Salmon, 26-Jun-2011.) |
Ref | Expression |
---|---|
uneq1d.1 | |
uneq12d.2 |
Ref | Expression |
---|---|
uneq12d |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uneq1d.1 | . 2 | |
2 | uneq12d.2 | . 2 | |
3 | uneq12 3762 | . 2 | |
4 | 1, 2, 3 | syl2anc 693 | 1 |
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