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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 3160 | 1 ⊢ 𝐴 ⊆ 𝐴 |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 2148 ⊆ wss 3130 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-11 1506 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-ext 2159 |
This theorem depends on definitions: df-bi 117 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-clel 2173 df-in 3136 df-ss 3143 |
This theorem is referenced by: ssidd 3177 eqimssi 3212 eqimss2i 3213 inv1 3460 difid 3492 undifabs 3500 pwidg 3590 elssuni 3838 unimax 3844 intmin 3865 rintm 3980 iunpw 4481 sucprcreg 4549 tfisi 4587 peano5 4598 xpss1 4737 xpss2 4738 residm 4940 resdm 4947 resmpt3 4957 ssrnres 5072 cocnvss 5155 dffn3 5377 fimacnv 5646 foima2 5753 tfrlem1 6309 rdgss 6384 fpmg 6674 findcard2d 6891 findcard2sd 6892 f1finf1o 6946 fidcenumlemr 6954 casef 7087 nnnninf 7124 1idprl 7589 1idpru 7590 ltexprlemm 7599 suplocexprlemmu 7717 elq 9622 expcl 10538 serclim0 11313 fsum2d 11443 fsumabs 11473 fsumiun 11485 fprod2d 11631 reef11 11707 subrgid 13344 topopn 13511 fiinbas 13552 topbas 13570 topcld 13612 ntrtop 13631 opnneissb 13658 opnssneib 13659 opnneiid 13667 idcn 13715 cnconst2 13736 lmres 13751 retopbas 14026 cnopncntop 14040 abscncf 14075 recncf 14076 imcncf 14077 cjcncf 14078 mulc1cncf 14079 cncfcn1cntop 14084 cncfmpt2fcntop 14088 addccncf 14089 cdivcncfap 14090 negfcncf 14092 expcncf 14095 cnrehmeocntop 14096 cnlimcim 14143 cnlimc 14144 cnlimci 14145 dvcnp2cntop 14166 dvcn 14167 dvef 14191 efcn 14192 |
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