| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > snnz | Structured version Visualization version GIF version | ||
| Description: The singleton of a set is not empty. (Contributed by NM, 10-Apr-1994.) |
| Ref | Expression |
|---|---|
| snnz.1 | ⊢ 𝐴 ∈ V |
| Ref | Expression |
|---|---|
| snnz | ⊢ {𝐴} ≠ ∅ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | snnz.1 | . 2 ⊢ 𝐴 ∈ V | |
| 2 | snnzg 4741 | . 2 ⊢ (𝐴 ∈ V → {𝐴} ≠ ∅) | |
| 3 | 1, 2 | ax-mp 5 | 1 ⊢ {𝐴} ≠ ∅ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2143 ≠ wne 2958 Vcvv 3455 ∅c0 4287 {csn 4590 |
| 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-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-dif 3909 df-nul 4288 df-sn 4591 |
| This theorem is referenced by: snsssn 4807 0nep0 5330 notsep 5336 nnullss 5445 snopeqop 5491 opthwiener 5499 fparlem3 8110 fparlem4 8111 1n0OLD 8474 fodomr 9117 mapdom3 9138 fodomfir 9288 ssfii 9380 marypha1lem 9394 djuexb 9896 fseqdom 10011 dfac5lem3 10110 isfin1-3 10371 axcc2lem 10421 axdc4lem 10440 fpwwe2lem12 10628 hash1n0 14460 s1nz 14647 isumltss 15904 pmtrprfvalrn 19559 gsumxp 20047 lsssn0 21050 pzriprnglem4 21615 frlmip 21909 t1connperf 23574 dissnlocfin 23667 isufil2 24046 cnextf 24204 ustuqtop1 24379 rrxip 25530 dveq0 26140 noxp1o 27808 bdayfo 27822 noetasuplem2 27879 noetasuplem4 27881 noetainflem2 27883 noetainflem4 27885 cutsun12 27964 cuteq0 27989 cuteq1 27991 cofcut1 28094 addcuts2 28153 leadds1 28163 addsuniflem 28175 addsasslem1 28177 addsasslem2 28178 negcut2 28214 mulcut2 28307 wwlksnext 30223 clwwlknon1sn 30432 esumnul 34419 bnj970 35316 filnetlem4 36873 bj-0nelsngl 37588 bj-2upln1upl 37641 dibn0 41908 diophrw 43473 dfac11 43772 fucofvalne 50086 |
| Copyright terms: Public domain | W3C validator |