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Mirrors > Home > MPE Home > Th. List > ovex | Structured version Visualization version Unicode version |
Description: The result of an operation is a set. (Contributed by NM, 13-Mar-1995.) |
Ref | Expression |
---|---|
ovex |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-ov 6653 | . 2 | |
2 | fvex 6201 | . 2 | |
3 | 1, 2 | eqeltri 2697 | 1 |
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