| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > nelne1 | Structured version Visualization version GIF version | ||
| Description: Two classes are different if they don't contain the same element. (Contributed by NM, 3-Feb-2012.) (Proof shortened by Wolf Lammen, 14-May-2023.) |
| Ref | Expression |
|---|---|
| nelne1 | ⊢ ((𝐴 ∈ 𝐵 ∧ ¬ 𝐴 ∈ 𝐶) → 𝐵 ≠ 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nelneq2 2885 | . 2 ⊢ ((𝐴 ∈ 𝐵 ∧ ¬ 𝐴 ∈ 𝐶) → ¬ 𝐵 = 𝐶) | |
| 2 | 1 | neqned 2962 | 1 ⊢ ((𝐴 ∈ 𝐵 ∧ ¬ 𝐴 ∈ 𝐶) → 𝐵 ≠ 𝐶) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 ∈ wcel 2145 ≠ wne 2955 |
| 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 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2752 df-clel 2835 df-ne 2956 |
| This theorem is used by: elnelne1 3072 difsnb 4769 fofinf1o 9299 fin23lem24 10357 fin23lem31 10378 ttukeylem7 10550 npomex 11038 drnglidl1ne0 20716 lbspss 21304 islbs3 21380 lbsextlem4 21386 ssdifidlprm 21589 obslbs 21983 hauspwpwf1 24253 ppiltx 27453 tglineneq 29032 lnopp2hpgb 29160 colopp 29166 plngrotlem1 29184 plngrotlem2 29185 lnssplnglem 29188 tgaaddcpbllem1 29268 tgaaddcpbl 29271 prlngmolem1 29349 prlngmolem2 29350 quadcgrprlng 29363 ex-pss 30948 drngidlhash 33902 mxidlmaxv 33912 mxidlprm 33914 drng0mxidl 33919 qsdrnglem2 33939 dflringlem3 33947 dflring3 33948 dflring4 33949 rsprprmprmidl 33973 1arithufdlem4 33998 ply1annnr 34254 irngnminplynz 34263 algextdeglem4 34271 unelldsys 34710 cntnevol 34780 fin2solem 38443 lshpnelb 39955 osumcllem10N 40936 pexmidlem7N 40947 dochsnkrlem1 42440 ricdrng1 43508 rpnnen3lem 43970 lvecpsslmod 49535 |
| Copyright terms: Public domain | W3C validator |