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Mirrors > Home > MPE Home > Th. List > snelpwi | Structured version Visualization version GIF version |
Description: A singleton of a set belongs to the power class of a class containing the set. (Contributed by Alan Sare, 25-Aug-2011.) |
Ref | Expression |
---|---|
snelpwi | ⊢ (𝐴 ∈ 𝐵 → {𝐴} ∈ 𝒫 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | snssi 4741 | . 2 ⊢ (𝐴 ∈ 𝐵 → {𝐴} ⊆ 𝐵) | |
2 | snex 5332 | . . 3 ⊢ {𝐴} ∈ V | |
3 | 2 | elpw 4543 | . 2 ⊢ ({𝐴} ∈ 𝒫 𝐵 ↔ {𝐴} ⊆ 𝐵) |
4 | 1, 3 | sylibr 236 | 1 ⊢ (𝐴 ∈ 𝐵 → {𝐴} ∈ 𝒫 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2114 ⊆ wss 3936 𝒫 cpw 4539 {csn 4567 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pr 5330 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-pw 4541 df-sn 4568 df-pr 4570 |
This theorem is referenced by: unipw 5343 canth2 8670 unifpw 8827 marypha1lem 8897 infpwfidom 9454 ackbij1lem4 9645 acsfn 16930 sylow2a 18744 dissnref 22136 dissnlocfin 22137 locfindis 22138 txdis 22240 txdis1cn 22243 symgtgp 22714 dispcmp 31123 esumcst 31322 cntnevol 31487 coinflippvt 31742 onsucsuccmpi 33791 topdifinffinlem 34631 pclfinN 37051 lpirlnr 39737 unipwrVD 41186 unipwr 41187 salexct 42637 salexct3 42645 salgencntex 42646 salgensscntex 42647 sge0tsms 42682 sge0cl 42683 sge0sup 42693 lincvalsng 44491 snlindsntor 44546 |
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