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Mirrors > Home > MPE Home > Th. List > neqne | Structured version Visualization version GIF version |
Description: From non-equality to inequality. (Contributed by Glauco Siliprandi, 11-Dec-2019.) |
Ref | Expression |
---|---|
neqne | ⊢ (¬ 𝐴 = 𝐵 → 𝐴 ≠ 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 22 | . 2 ⊢ (¬ 𝐴 = 𝐵 → ¬ 𝐴 = 𝐵) | |
2 | 1 | neqned 2949 | 1 ⊢ (¬ 𝐴 = 𝐵 → 𝐴 ≠ 𝐵) |
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