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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 2888 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ ¬ 𝐵 ∈ 𝐶) → ¬ 𝐴 = 𝐵) | |
| 2 | 1 | neqned 2966 | 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 2959 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-ext 2735 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1812 df-cleq 2755 df-clel 2839 df-ne 2960 |
| This theorem is used by: nelelne 3060 elnelne2 3077 elneeldif 4056 elpwdifsn 4752 f1ounsn 7290 ac5num 10128 infpssrlem4 10397 fpwwe2lem12 10740 zgt1rpn0n1 13176 cats1un 14884 dprdfadd 20251 dprdcntz2 20269 lbsextlem4 21454 lindff1 22141 hauscmplem 23739 fileln0 24184 zcld 25148 dvcnvlem 26311 ppinprm 27494 chtnprm 27496 tglnpt4 29138 footexALT 29208 footexlem1 29209 footexlem2 29210 foot 29212 colperpexlem3 29223 mideulem2 29225 opphllem 29226 opphllem2 29239 lnopp2hpgb 29256 colhp 29263 plngrotlem1 29280 plngrotlem2 29281 plngrot 29283 lnssplnglem 29284 lmieu 29304 trgcopy 29326 trgcopyeulem 29327 ragraghl 29361 tgaaddcpbllem1 29364 tgaaddcpbl 29367 perpprlng 29443 prlngex 29444 prlngmolem1 29445 prlngmid2 29454 quadcgrprlng 29459 tgextahpl 33084 tgextalem1inag 33085 cycpmco2lem1 33743 cycpmco2 33750 cyc3genpmlem 33768 unitnz 33855 fracfld 33926 linds2eq 33992 elrspunsn 34035 mxidlnzr 34048 lindsunlem 34312 fedgmul 34319 extdg1id 34354 2sqr3minply 34468 cos9thpiminplylem2 34471 ordtconnlem1 34612 esum2dlem 34780 subfacp1lem5 36073 heiborlem6 38896 llnle 40721 lplnle 40743 lhpexle1lem 41210 cdleme18b 41495 cdlemg46 41938 cdlemh 42020 ine1 43517 bcc0 45470 fnchoice 46191 climxrre 46905 stoweidlem43 47198 zneoALTV 48912 oppfrcllem 50388 oppfrcl2 50390 eloppf 50394 |
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