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Related theorems Unicode version |
| Description: Modus tollens deduction. |
| Ref | Expression |
|---|---|
| mtod.1 |
|
| mtod.2 |
|
| Ref | Expression |
|---|---|
| mtod |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mtod.1 |
. 2
| |
| 2 | mtod.2 |
. . 3
| |
| 3 | 2 | con3d 95 |
. 2
|
| 4 | 1, 3 | mpd 26 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: mtbid 719 mtbird 720 po2nr 2925 po3nr 2926 ordn2lp 2995 onssneli 3079 onsucuni2 3188 nlimsucg 3196 tfi 3207 nnlim 3231 peano5 3241 tz7.48-3 4259 oalimcl 4330 omlimcl 4345 oneo 4348 sdomnsym 4607 php3 4662 onomeneq 4665 rankr1 4820 rankel 4826 ondomcard 5007 alephordi 5024 cardaleph 5035 ltrpq 5239 prlem934 5293 suplem2pr 5316 zneo 6371 sqr2irrlem3 6927 abssubne0 7085 facndiv 7146 climrecl 7313 ivthlem6 7491 lmle 8171 nvex 8477 efif1lem5 9006 irredlem1 10599 mtand 11372 mtord 11373 ordtypelem6 11432 onsdom 11437 omsubdom 11443 elomsubsd 11446 infenomsub 11450 cptclsscpt 11489 alexsublem4 11499 filufint 11659 ufilen 11664 filcon 11665 rnelfmlem 11698 fmfnfm 11704 fcluscomp 11733 filnetlem3 11765 fsumlt1 11894 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 |