| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > neldifsn | Structured version Visualization version GIF version | ||
| Description: The class 𝐴 is not in (𝐵 ∖ {𝐴}). (Contributed by David Moews, 1-May-2017.) |
| Ref | Expression |
|---|---|
| neldifsn | ⊢ ¬ 𝐴 ∈ (𝐵 ∖ {𝐴}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | neirr 2967 | . 2 ⊢ ¬ 𝐴 ≠ 𝐴 | |
| 2 | eldifsni 4758 | . 2 ⊢ (𝐴 ∈ (𝐵 ∖ {𝐴}) → 𝐴 ≠ 𝐴) | |
| 3 | 1, 2 | mto 200 | 1 ⊢ ¬ 𝐴 ∈ (𝐵 ∖ {𝐴}) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∈ wcel 2143 ≠ wne 2958 ∖ cdif 3902 {csn 4589 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-tru 1573 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-v 3457 df-dif 3908 df-sn 4590 |
| This theorem is referenced by: neldifsnd 4761 fofinf1o 9285 dfac9 10116 1div0 11868 xrsupss 13330 hashgt23el 14457 fvsetsid 17223 islbs3 21279 islindf4 21988 ufinffr 24086 i1fd 25840 finsumvtxdg2sstep 29899 matunitlindflem1 38287 poimirlem25 38316 itg2addnclem 38342 itg2addnclem2 38343 prter2 39675 |
| Copyright terms: Public domain | W3C validator |