Description: Negation invariance for gcd. (Contributed by metakunt, 25-Apr-2024)
Ref | Expression | ||
---|---|---|---|
Hypotheses | neggcdnni.1 | ||
neggcdnni.2 | |||
Assertion | neggcdnni |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | neggcdnni.1 | ||
2 | neggcdnni.2 | ||
3 | 1 | nnzi | |
4 | 2 | nnzi | |
5 | 3 4 | pm3.2i | |
6 | neggcd | ||
7 | 5 6 | ax-mp |