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Related theorems GIF version |
| Description: Deduce a converse commuted implication from a logical equivalence. |
| Ref | Expression |
|---|---|
| biimpd.1 | ⊢ (φ → (ψ ↔ χ)) |
| Ref | Expression |
|---|---|
| biimprcd | ⊢ (χ → (φ → ψ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | biimpd.1 | . . 3 ⊢ (φ → (ψ ↔ χ)) | |
| 2 | 1 | biimprd 154 | . 2 ⊢ (φ → (χ → ψ)) |
| 3 | 2 | com12 11 | 1 ⊢ (χ → (φ → ψ)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ↔ wb 146 |
| This theorem is referenced by: biimparc 421 prlem1 774 ax11i 1142 ax11eq 1367 ax11el 1368 eleq1a 1550 ceqsalg 1832 cgsexg 1838 cgsex2g 1839 cgsex4g 1840 ceqsex 1841 cla42egv 1871 cla43egv 1873 ralxfr 2915 iunpw 2930 onfr 3002 ordun 3097 funcnvuni 3580 funfvop 3819 cbvfo 3901 abianfp 3978 oaordex 4208 ecelqsi 4310 eceqopreq 4331 fundmen 4446 nneneq 4532 unfilem1 4566 ac6lem 4771 zorn2lem3 4807 zorn2lem7 4811 ltrpq 5105 genpnnp 5128 ltaddpr 5160 reclem3pr 5178 reclem4pr 5179 suppsrlem 5241 suppsr3 5244 suprelem 5279 elfz4 6443 abslti 6907 abslei 6908 cau2i 6945 fsum1i 7037 ser1clim0 7205 unctb 7610 cnsscnp 7798 nmoubi 8460 nmopub 9856 nmfnleub 9873 mdbr3 10249 mdbr4 10250 atssma 10330 atcvatlem 10337 uninqs 10466 hmphre 10563 iintlem1 10653 mrdmcd 10743 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 |
| This theorem depends on definitions: df-bi 147 |