| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > snnzg | Structured version Visualization version GIF version | ||
| Description: The singleton of a set is not empty. (Contributed by NM, 14-Dec-2008.) |
| Ref | Expression |
|---|---|
| snnzg | ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≠ ∅) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | snidg 4617 | . 2 ⊢ (𝐴 ∈ 𝑉 → 𝐴 ∈ {𝐴}) | |
| 2 | 1 | ne0d 4294 | 1 ⊢ (𝐴 ∈ 𝑉 → {𝐴} ≠ ∅) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2113 ≠ wne 2932 ∅c0 4285 {csn 4580 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-dif 3904 df-nul 4286 df-sn 4581 |
| This theorem is referenced by: snn0d 4732 snnz 4733 frirr 5600 frsn 5712 omsucne 7827 1stconst 8042 2ndconst 8043 fczsupp0 8135 hashge3el3dif 14410 pwsbas 17407 pwsle 17413 trnei 23836 uffix 23865 neiflim 23918 flimclslem 23928 fclsfnflim 23971 ustneism 24168 ustuqtop5 24189 dv11cn 25962 noextendseq 27635 cutbdaylt 27794 eqcuts3 27800 lltr 27858 snsssng 32589 cosnop 32774 elpadd2at 40076 onnoxpg 43680 onnobdayg 43681 bdaybndbday 43683 |
| Copyright terms: Public domain | W3C validator |