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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 2889 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ ¬ 𝐵 ∈ 𝐶) → ¬ 𝐴 = 𝐵) | |
| 2 | 1 | neqned 2967 | 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 2146 ≠ wne 2960 |
| 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 2148 ax-9 2156 ax-ext 2737 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2757 df-clel 2840 df-ne 2961 |
| This theorem is used by: nelelne 3061 elnelne2 3078 elneeldif 3920 elpwdifsn 4759 f1ounsn 7279 ac5num 10036 infpssrlem4 10305 fpwwe2lem12 10646 zgt1rpn0n1 13079 cats1un 14784 dprdfadd 20140 dprdcntz2 20158 lbsextlem4 21339 lindff1 22024 hauscmplem 23617 fileln0 24062 zcld 25026 dvcnvlem 26190 ppinprm 27371 chtnprm 27373 tglnpt4 28983 footexALT 29053 footexlem1 29054 footexlem2 29055 foot 29057 colperpexlem3 29068 mideulem2 29070 opphllem 29071 opphllem2 29084 lnopp2hpgb 29100 colhp 29107 plngrotlem1 29124 plngrotlem2 29125 plngrot 29127 lnssplnglem 29128 lmieu 29148 trgcopy 29170 trgcopyeulem 29171 ragraghl 29204 tgaaddcpbllem1 29207 tgaaddcpbl 29210 perpprlng 29259 prlngex 29260 prlngmolem1 29261 prlngmid2 29270 quadcgrprlng 29275 cycpmco2lem1 33514 cycpmco2 33521 cyc3genpmlem 33539 unitnz 33626 fracfld 33697 linds2eq 33762 elrspunsn 33805 mxidlnzr 33818 lindsunlem 34082 fedgmul 34089 extdg1id 34124 2sqr3minply 34238 cos9thpiminplylem2 34241 ordtconnlem1 34382 esum2dlem 34550 subfacp1lem5 35717 mh-inf3f1 37113 heiborlem6 38529 llnle 40354 lplnle 40376 lhpexle1lem 40843 cdleme18b 41128 cdlemg46 41571 cdlemh 41653 ine1 43152 bcc0 45127 fnchoice 45826 climxrre 46541 stoweidlem43 46834 zneoALTV 48511 oppfrcllem 49981 oppfrcl2 49983 eloppf 49987 |
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