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Mirrors > Home > ILE Home > Th. List > snssd | Unicode version |
Description: The singleton of an element of a class is a subset of the class (deduction form). (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) |
Ref | Expression |
---|---|
snssd.1 |
Ref | Expression |
---|---|
snssd |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | snssd.1 | . 2 | |
2 | snssg 3651 | . . 3 | |
3 | 1, 2 | syl 14 | . 2 |
4 | 1, 3 | mpbid 146 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wb 104 wcel 1480 wss 3066 csn 3522 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-v 2683 df-in 3072 df-ss 3079 df-sn 3528 |
This theorem is referenced by: pwntru 4117 ecinxp 6497 xpdom3m 6721 ac6sfi 6785 undifdc 6805 iunfidisj 6827 fidcenumlemr 6836 ssfii 6855 en2other2 7045 un0addcl 9003 un0mulcl 9004 fseq1p1m1 9867 fsumge1 11223 phicl2 11879 ennnfonelemhf1o 11915 rest0 12337 iscnp4 12376 cnconst2 12391 cnpdis 12400 txdis 12435 txdis1cn 12436 fsumcncntop 12714 dvef 12845 bj-omtrans 13143 pwtrufal 13181 |
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