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Related theorems GIF version |
| Description: This theorem, called "Assertion," can be thought of as closed form of modus ponens ax-mp 7. Theorem *2.27 of [WhiteheadRussell] p. 104. |
| Ref | Expression |
|---|---|
| pm2.27 | ⊢ (φ → ((φ → ψ) → ψ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 59 | . 2 ⊢ ((φ → ψ) → (φ → ψ)) | |
| 2 | 1 | com12 11 | 1 ⊢ (φ → ((φ → ψ) → ψ)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 |
| This theorem is referenced by: pm2.43 63 pm3.2im 121 mth8 122 a1bi 195 pm3.35 357 pm2.75 577 biimt 736 meredith 931 ax10o 1176 r19.27av 1800 vtoclegft 1902 tfindsg 3213 ac6sfilem3 4590 ac6sfi 4591 xrub 6248 metequiv 8091 caun0 8156 bcthlem2 8211 vacnlem3 8584 dmdbr5 10516 ref3w 10772 pospos 10882 tostos 10883 osneisi 11018 efilcp 11083 efilcp2 11087 bwt2 11123 inficlALT 11424 ordiso 11426 subntr 11482 compsublem 11487 compsub 11488 hscptsscld 11491 cncomp 11494 dfcon2 11501 connsub 11502 cnconn 11503 topbasfne 11560 locfincomp 11575 neibastop1 11579 fbssint 11626 fbunfip 11631 isufil2 11650 fixufil 11661 flimopn 11679 limfilcf 11683 hausfillim 11685 cnpfillim 11686 morex 11804 fimax 11837 fisupg 11839 fixp 11840 indexf 11847 filbcmb 11857 lmtlm 11969 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-mp 7 |