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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 2856 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ ¬ 𝐵 ∈ 𝐶) → ¬ 𝐴 = 𝐵) | |
2 | 1 | neqned 2946 | 1 ⊢ ((𝐴 ∈ 𝐶 ∧ ¬ 𝐵 ∈ 𝐶) → 𝐴 ≠ 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 396 ∈ wcel 2106 ≠ wne 2939 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-ext 2702 |
This theorem depends on definitions: df-bi 206 df-an 397 df-ex 1782 df-cleq 2723 df-clel 2809 df-ne 2940 |
This theorem is referenced by: nelelne 3040 elnelne2 3057 elneeldif 3927 elpwdifsn 4754 ac5num 9981 infpssrlem4 10251 fpwwe2lem12 10587 zgt1rpn0n1 12965 cats1un 14621 dprdfadd 19813 dprdcntz2 19831 lbsextlem4 20681 lindff1 21263 hauscmplem 22794 fileln0 23238 zcld 24213 dvcnvlem 25377 ppinprm 26538 chtnprm 26540 footexALT 27723 footexlem1 27724 footexlem2 27725 foot 27727 colperpexlem3 27737 mideulem2 27739 opphllem 27740 opphllem2 27753 lnopp2hpgb 27768 colhp 27775 lmieu 27789 trgcopy 27809 trgcopyeulem 27810 cycpmco2lem1 32045 cycpmco2 32052 cyc3genpmlem 32070 linds2eq 32241 mxidlnzr 32312 lindsunlem 32406 fedgmul 32413 extdg1id 32439 ordtconnlem1 32594 esum2dlem 32780 subfacp1lem5 33865 heiborlem6 36348 llnle 38054 lplnle 38076 lhpexle1lem 38543 cdleme18b 38828 cdlemg46 39271 cdlemh 39353 bcc0 42742 fnchoice 43356 climxrre 44111 stoweidlem43 44404 zneoALTV 45981 |
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