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Mirrors > Home > MPE Home > Th. List > 3brtr4d | Structured version Visualization version Unicode version |
Description: Substitution of equality into both sides of a binary relation. (Contributed by NM, 21-Feb-2005.) |
Ref | Expression |
---|---|
3brtr4d.1 | |
3brtr4d.2 | |
3brtr4d.3 |
Ref | Expression |
---|---|
3brtr4d |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3brtr4d.1 | . 2 | |
2 | 3brtr4d.2 | . . 3 | |
3 | 3brtr4d.3 | . . 3 | |
4 | 2, 3 | breq12d 4666 | . 2 |
5 | 1, 4 | mpbird 247 | 1 |
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