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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 2885 | . 2 ⊢ ((𝐴 ∈ 𝐶 ∧ ¬ 𝐵 ∈ 𝐶) → ¬ 𝐴 = 𝐵) | |
| 2 | 1 | neqned 2963 | 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 2956 |
| 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 2733 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2753 df-clel 2836 df-ne 2957 |
| This theorem is used by: nelelne 3057 elnelne2 3074 elneeldif 3913 elpwdifsn 4752 f1ounsn 7280 ac5num 10115 infpssrlem4 10384 fpwwe2lem12 10727 zgt1rpn0n1 13163 cats1un 14870 dprdfadd 20236 dprdcntz2 20254 lbsextlem4 21439 lindff1 22126 hauscmplem 23724 fileln0 24169 zcld 25133 dvcnvlem 26296 ppinprm 27479 chtnprm 27481 tglnpt4 29123 footexALT 29193 footexlem1 29194 footexlem2 29195 foot 29197 colperpexlem3 29208 mideulem2 29210 opphllem 29211 opphllem2 29224 lnopp2hpgb 29241 colhp 29248 plngrotlem1 29265 plngrotlem2 29266 plngrot 29268 lnssplnglem 29269 lmieu 29289 trgcopy 29311 trgcopyeulem 29312 ragraghl 29346 tgaaddcpbllem1 29349 tgaaddcpbl 29352 perpprlng 29428 prlngex 29429 prlngmolem1 29430 prlngmid2 29439 quadcgrprlng 29444 cycpmco2lem1 33687 cycpmco2 33694 cyc3genpmlem 33712 unitnz 33799 fracfld 33870 linds2eq 33936 elrspunsn 33979 mxidlnzr 33992 lindsunlem 34256 fedgmul 34263 extdg1id 34298 2sqr3minply 34412 cos9thpiminplylem2 34415 ordtconnlem1 34556 esum2dlem 34724 subfacp1lem5 35949 heiborlem6 38750 llnle 40575 lplnle 40597 lhpexle1lem 41064 cdleme18b 41349 cdlemg46 41792 cdlemh 41874 ine1 43371 bcc0 45323 fnchoice 46045 climxrre 46759 stoweidlem43 47052 zneoALTV 48766 oppfrcllem 50234 oppfrcl2 50236 eloppf 50240 |
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