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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 2887 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ ¬ 𝐵 ∈ 𝐶) → ¬ 𝐴 = 𝐵) | |
| 2 | 1 | neqned 2965 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ ¬ 𝐵 ∈ 𝐶) → 𝐴 ≠ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 400 ∈ wcel 2143 ≠ wne 2958 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 401 df-ex 1810 df-cleq 2755 df-clel 2838 df-ne 2959 |
| This theorem is used by: nelelne 3059 elnelne2 3076 elneeldif 3919 elpwdifsn 4757 f1ounsn 7270 ac5num 10025 infpssrlem4 10294 fpwwe2lem12 10631 zgt1rpn0n1 13063 cats1un 14763 dprdfadd 20096 dprdcntz2 20114 lbsextlem4 21294 lindff1 21979 hauscmplem 23572 fileln0 24016 zcld 24980 dvcnvlem 26144 ppinprm 27325 chtnprm 27327 tglnpt4 28937 footexALT 29007 footexlem1 29008 footexlem2 29009 foot 29011 colperpexlem3 29022 mideulem2 29024 opphllem 29025 opphllem2 29038 lnopp2hpgb 29054 colhp 29061 plngrotlem1 29078 plngrotlem2 29079 plngrot 29081 lnssplnglem 29082 lmieu 29102 trgcopy 29124 trgcopyeulem 29125 ragraghl 29158 perpprlng 29209 prlngex 29210 prlngmolem1 29211 prlngmid2 29220 quadcgrprlng 29225 cycpmco2lem1 33455 cycpmco2 33462 cyc3genpmlem 33480 unitnz 33567 fracfld 33638 linds2eq 33703 elrspunsn 33746 mxidlnzr 33759 lindsunlem 34023 fedgmul 34030 extdg1id 34065 2sqr3minply 34179 cos9thpiminplylem2 34182 ordtconnlem1 34323 esum2dlem 34491 subfacp1lem5 35684 mh-inf3f1 37080 heiborlem6 38495 llnle 40320 lplnle 40342 lhpexle1lem 40809 cdleme18b 41094 cdlemg46 41537 cdlemh 41619 ine1 43103 bcc0 45078 fnchoice 45777 climxrre 46492 stoweidlem43 46785 zneoALTV 48462 oppfrcllem 49933 oppfrcl2 49935 eloppf 49939 |
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