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Mirrors > Home > MPE Home > Th. List > imim1 | Structured version Visualization version GIF version |
Description: A closed form of syllogism (see syl 17). Theorem *2.06 of [WhiteheadRussell] p. 100. Its associated inference is imim1i 61. (Contributed by NM, 29-Dec-1992.) (Proof shortened by Wolf Lammen, 25-May-2013.) |
Ref | Expression |
---|---|
imim1 | ⊢ ((𝜑 → 𝜓) → ((𝜓 → 𝜒) → (𝜑 → 𝜒))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 22 | . 2 ⊢ ((𝜑 → 𝜓) → (𝜑 → 𝜓)) | |
2 | 1 | imim1d 80 | 1 ⊢ ((𝜑 → 𝜓) → ((𝜓 → 𝜒) → (𝜑 → 𝜒))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 |
This theorem is referenced by: pm2.83 82 peirceroll 83 looinv 193 pm3.33 607 tbw-ax1 1616 moim 2507 mrcmndind 17189 tb-ax1 31548 bj-imim21 31709 al2imVD 38120 syl5impVD 38121 hbimpgVD 38162 hbalgVD 38163 ax6e2ndeqVD 38167 2sb5ndVD 38168 |
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