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Mirrors > Home > MPE Home > Th. List > mt3d | Structured version Visualization version GIF version |
Description: Modus tollens deduction. (Contributed by NM, 26-Mar-1995.) |
Ref | Expression |
---|---|
mt3d.1 | ⊢ (𝜑 → ¬ 𝜒) |
mt3d.2 | ⊢ (𝜑 → (¬ 𝜓 → 𝜒)) |
Ref | Expression |
---|---|
mt3d | ⊢ (𝜑 → 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mt3d.1 | . 2 ⊢ (𝜑 → ¬ 𝜒) | |
2 | mt3d.2 | . . 3 ⊢ (𝜑 → (¬ 𝜓 → 𝜒)) | |
3 | 2 | con1d 145 | . 2 ⊢ (𝜑 → (¬ 𝜒 → 𝜓)) |
4 | 1, 3 | mpd 15 | 1 ⊢ (𝜑 → 𝜓) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem is referenced by: mt3i 149 olcnd 876 ecase23d 1474 disjss3 5147 nnsuc 7870 poxp2 8126 frrlem14 8281 unxpdomlem2 9248 oismo 9532 cnfcom3lem 9695 rankelb 9816 fin33i 10361 isf34lem4 10369 canthp1lem2 10645 gchdju1 10648 pwfseqlem3 10652 inttsk 10766 r1tskina 10774 nqereu 10921 zbtwnre 12927 discr1 14199 seqcoll2 14423 bitsfzo 16373 bitsf1 16384 eucalglt 16519 4sqlem17 16891 4sqlem18 16892 ramubcl 16948 psgnunilem5 19357 odnncl 19408 gexnnod 19451 sylow1lem1 19461 torsubg 19717 prmcyg 19757 ablfacrplem 19930 pgpfac1lem2 19940 pgpfac1lem3a 19941 pgpfac1lem3 19942 xrsdsreclblem 20984 prmirredlem 21034 ppttop 22502 pptbas 22503 regr1lem 23235 alexsublem 23540 reconnlem1 24334 metnrmlem1a 24366 vitalilem4 25120 vitalilem5 25121 itg2gt0 25270 rollelem 25498 lhop1lem 25522 coefv0 25754 plyexmo 25818 lgamucov 26532 ppinprm 26646 chtnprm 26648 lgsdir 26825 lgseisenlem1 26868 2sqlem7 26917 2sqblem 26924 pntpbnd1 27079 madebdaylemlrcut 27383 dfon2lem8 34751 poimirlem25 36502 fdc 36602 ac6s6 37029 2atm 38387 llnmlplnN 38399 trlval3 39047 cdleme0moN 39085 cdleme18c 39153 qirropth 41632 aacllem 47802 |
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