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Mirrors > Home > MPE Home > Th. List > oveq2 | Structured version Visualization version Unicode version |
Description: Equality theorem for operation value. (Contributed by NM, 28-Feb-1995.) |
Ref | Expression |
---|---|
oveq2 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | opeq2 4137 |
. . 3
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2 | 1 | fveq2d 5852 |
. 2
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3 | df-ov 6279 |
. 2
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4 | df-ov 6279 |
. 2
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5 | 2, 3, 4 | 3eqtr4g 2511 |
1
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