Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > biimpac | GIF version |
Description: Inference from a logical equivalence. (Contributed by NM, 3-May-1994.) |
Ref | Expression |
---|---|
biimpa.1 | ⊢ (𝜑 → (𝜓 ↔ 𝜒)) |
Ref | Expression |
---|---|
biimpac | ⊢ ((𝜓 ∧ 𝜑) → 𝜒) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | biimpa.1 | . . 3 ⊢ (𝜑 → (𝜓 ↔ 𝜒)) | |
2 | 1 | biimpcd 148 | . 2 ⊢ (𝜓 → (𝜑 → 𝜒)) |
3 | 2 | imp 115 | 1 ⊢ ((𝜓 ∧ 𝜑) → 𝜒) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 97 ↔ wb 98 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 |
This theorem depends on definitions: df-bi 110 |
This theorem is referenced by: gencbvex2 2601 ordtri2or2exmidlem 4251 onsucelsucexmidlem 4254 ordsuc 4287 onsucuni2 4288 poltletr 4725 tz6.12-1 5200 nfunsn 5207 nnaordex 6100 th3qlem1 6208 ssfiexmid 6336 diffitest 6344 nqnq0pi 6536 distrlem1prl 6680 distrlem1pru 6681 eqle 7109 |
Copyright terms: Public domain | W3C validator |