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Mirrors > Home > MPE Home > Th. List > eldifad | Unicode version |
Description: If a class is in the difference of two classes, it is also in the minuend. One-way deduction form of eldif 3485. (Contributed by David Moews, 1-May-2017.) |
Ref | Expression |
---|---|
eldifad.1 |
Ref | Expression |
---|---|
eldifad |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eldifad.1 | . . 3 | |
2 | eldif 3485 | . . 3 | |
3 | 1, 2 | sylib 196 | . 2 |
4 | 3 | simpld 459 | 1 |
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