| Metamath Proof Explorer |
< Previous
Next >
Related theorems GIF version |
| Description: Importation inference. |
| Ref | Expression |
|---|---|
| 3imp.1 | ⊢ (φ → (ψ → (χ → θ))) |
| Ref | Expression |
|---|---|
| 3imp | ⊢ ((φ ∧ ψ ∧ χ) → θ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3an 583 | . 2 ⊢ ((φ ∧ ψ ∧ χ) ↔ ((φ ∧ ψ) ∧ χ)) | |
| 2 | 3imp.1 | . . 3 ⊢ (φ → (ψ → (χ → θ))) | |
| 3 | 2 | imp31 280 | . 2 ⊢ (((φ ∧ ψ) ∧ χ) → θ) |
| 4 | 1, 3 | sylbi 174 | 1 ⊢ ((φ ∧ ψ ∧ χ) → θ) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 ∧ w3a 581 |
| This theorem is referenced by: 3impa 609 3impb 610 3com12 614 3com23 616 syl3an2 620 syl3an3 621 3jao 632 3gencl 1367 vtocl3ga 1389 dedth3h 1788 oawordri 3152 oaass 3163 nndi 3180 nnmass 3181 nnmordi 3188 3ecoptocl 3241 eceqopreq 3249 addsubt 4151 divasst 4239 div23t 4240 expaddt 4698 spansncol 5473 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 |
| This theorem depends on definitions: df-bi 128 df-an 198 df-3an 583 |