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Mirrors > Home > MPE Home > Th. List > pncand | Structured version Visualization version Unicode version |
Description: Cancellation law for subtraction. (Contributed by Mario Carneiro, 27-May-2016.) |
Ref | Expression |
---|---|
negidd.1 | |
pncand.2 |
Ref | Expression |
---|---|
pncand |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | negidd.1 | . 2 | |
2 | pncand.2 | . 2 | |
3 | pncan 10287 | . 2 | |
4 | 1, 2, 3 | syl2anc 693 | 1 |
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