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Mirrors > Home > ILE Home > Th. List > ssid | GIF version |
Description: Any class is a subclass of itself. Exercise 10 of [TakeutiZaring] p. 18. (Contributed by NM, 5-Aug-1993.) (Proof shortened by Andrew Salmon, 14-Jun-2011.) |
Ref | Expression |
---|---|
ssid | ⊢ 𝐴 ⊆ 𝐴 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 19 | . 2 ⊢ (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐴) | |
2 | 1 | ssriv 3096 | 1 ⊢ 𝐴 ⊆ 𝐴 |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1480 ⊆ wss 3066 |
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-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-11 1484 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-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-in 3072 df-ss 3079 |
This theorem is referenced by: ssidd 3113 eqimssi 3148 eqimss2i 3149 inv1 3394 difid 3426 undifabs 3434 pwidg 3519 elssuni 3759 unimax 3765 intmin 3786 rintm 3900 iunpw 4396 sucprcreg 4459 tfisi 4496 peano5 4507 xpss1 4644 xpss2 4645 residm 4846 resdm 4853 resmpt3 4863 ssrnres 4976 cocnvss 5059 dffn3 5278 fimacnv 5542 foima2 5646 tfrlem1 6198 rdgss 6273 fpmg 6561 findcard2d 6778 findcard2sd 6779 f1finf1o 6828 fidcenumlemr 6836 casef 6966 nnnninf 7016 1idprl 7391 1idpru 7392 ltexprlemm 7401 suplocexprlemmu 7519 elq 9407 expcl 10304 serclim0 11067 fsum2d 11197 fsumabs 11227 fsumiun 11239 reef11 11395 ressid 12009 topopn 12164 fiinbas 12205 topbas 12225 topcld 12267 ntrtop 12286 opnneissb 12313 opnssneib 12314 opnneiid 12322 idcn 12370 cnconst2 12391 lmres 12406 retopbas 12681 cnopncntop 12695 abscncf 12730 recncf 12731 imcncf 12732 cjcncf 12733 mulc1cncf 12734 cncfcn1cntop 12739 cncfmpt2fcntop 12743 addccncf 12744 cdivcncfap 12745 negfcncf 12747 expcncf 12750 cnrehmeocntop 12751 cnlimcim 12798 cnlimc 12799 cnlimci 12800 dvcnp2cntop 12821 dvcn 12822 dvef 12845 efcn 12846 |
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