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| Mirrors > Home > MPE Home > Th. List > nelne2 | Structured version Visualization version GIF version | ||
| Description: Two classes are different if they don't belong to the same class. (Contributed by NM, 25-Jun-2012.) (Proof shortened by Wolf Lammen, 14-May-2023.) |
| Ref | Expression |
|---|---|
| nelne2 | ⊢ ((𝐴 ∈ 𝐶 ∧ ¬ 𝐵 ∈ 𝐶) → 𝐴 ≠ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nelneq 2884 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ ¬ 𝐵 ∈ 𝐶) → ¬ 𝐴 = 𝐵) | |
| 2 | 1 | neqned 2962 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ ¬ 𝐵 ∈ 𝐶) → 𝐴 ≠ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 ∈ wcel 2145 ≠ wne 2955 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2752 df-clel 2835 df-ne 2956 |
| This theorem is used by: nelelne 3056 elnelne2 3073 elneeldif 3913 elpwdifsn 4752 f1ounsn 7274 ac5num 10042 infpssrlem4 10311 fpwwe2lem12 10654 zgt1rpn0n1 13088 cats1un 14793 dprdfadd 20152 dprdcntz2 20170 lbsextlem4 21351 lindff1 22036 hauscmplem 23634 fileln0 24079 zcld 25043 dvcnvlem 26206 ppinprm 27391 chtnprm 27393 tglnpt4 29005 footexALT 29075 footexlem1 29076 footexlem2 29077 foot 29079 colperpexlem3 29090 mideulem2 29092 opphllem 29093 opphllem2 29106 lnopp2hpgb 29123 colhp 29130 plngrotlem1 29147 plngrotlem2 29148 plngrot 29150 lnssplnglem 29151 lmieu 29171 trgcopy 29193 trgcopyeulem 29194 ragraghl 29228 tgaaddcpbllem1 29231 tgaaddcpbl 29234 perpprlng 29310 prlngex 29311 prlngmolem1 29312 prlngmid2 29321 quadcgrprlng 29326 cycpmco2lem1 33569 cycpmco2 33576 cyc3genpmlem 33594 unitnz 33681 fracfld 33752 linds2eq 33817 elrspunsn 33860 mxidlnzr 33873 lindsunlem 34137 fedgmul 34144 extdg1id 34179 2sqr3minply 34293 cos9thpiminplylem2 34296 ordtconnlem1 34437 esum2dlem 34605 subfacp1lem5 35766 heiborlem6 38569 llnle 40394 lplnle 40416 lhpexle1lem 40883 cdleme18b 41168 cdlemg46 41611 cdlemh 41693 ine1 43192 bcc0 45167 fnchoice 45866 climxrre 46581 stoweidlem43 46874 zneoALTV 48588 oppfrcllem 50056 oppfrcl2 50058 eloppf 50062 |
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