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Mirrors > Home > MPE Home > Th. List > difexg | Structured version Visualization version Unicode version |
Description: Existence of a difference. (Contributed by NM, 26-May-1998.) |
Ref | Expression |
---|---|
difexg |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | difss 3737 | . 2 | |
2 | ssexg 4804 | . 2 | |
3 | 1, 2 | mpan 706 | 1 |
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