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Mirrors > Home > MPE Home > Th. List > uneq2d | Structured version Visualization version Unicode version |
Description: Deduction adding union to the left in a class equality. (Contributed by NM, 29-Mar-1998.) |
Ref | Expression |
---|---|
uneq1d.1 |
Ref | Expression |
---|---|
uneq2d |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | uneq1d.1 | . 2 | |
2 | uneq2 3761 | . 2 | |
3 | 1, 2 | syl 17 | 1 |
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