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Mirrors > Home > ILE Home > Th. List > intnanrd | GIF version |
Description: Introduction of conjunct inside of a contradiction. (Contributed by NM, 10-Jul-2005.) |
Ref | Expression |
---|---|
intnand.1 | ⊢ (𝜑 → ¬ 𝜓) |
Ref | Expression |
---|---|
intnanrd | ⊢ (𝜑 → ¬ (𝜓 ∧ 𝜒)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | intnand.1 | . 2 ⊢ (𝜑 → ¬ 𝜓) | |
2 | simpl 107 | . 2 ⊢ ((𝜓 ∧ 𝜒) → 𝜓) | |
3 | 1, 2 | nsyl 591 | 1 ⊢ (𝜑 → ¬ (𝜓 ∧ 𝜒)) |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 102 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-in1 577 ax-in2 578 |
This theorem is referenced by: dcan 876 bianfd 890 frecabcl 6096 frecsuclem 6103 xrrebnd 9176 fzpreddisj 9378 gcdsupex 10729 gcdsupcl 10730 nndvdslegcd 10737 divgcdnn 10746 sqgcd 10798 coprm 10903 |
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