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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 3159 | 1 ⊢ 𝐴 ⊆ 𝐴 |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 2148 ⊆ wss 3129 |
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 3135 df-ss 3142 |
This theorem is referenced by: ssidd 3176 eqimssi 3211 eqimss2i 3212 inv1 3459 difid 3491 undifabs 3499 pwidg 3589 elssuni 3837 unimax 3843 intmin 3864 rintm 3979 iunpw 4480 sucprcreg 4548 tfisi 4586 peano5 4597 xpss1 4736 xpss2 4737 residm 4939 resdm 4946 resmpt3 4956 ssrnres 5071 cocnvss 5154 dffn3 5376 fimacnv 5645 foima2 5752 tfrlem1 6308 rdgss 6383 fpmg 6673 findcard2d 6890 findcard2sd 6891 f1finf1o 6945 fidcenumlemr 6953 casef 7086 nnnninf 7123 1idprl 7588 1idpru 7589 ltexprlemm 7598 suplocexprlemmu 7716 elq 9621 expcl 10537 serclim0 11312 fsum2d 11442 fsumabs 11472 fsumiun 11484 fprod2d 11630 reef11 11706 subrgid 13342 topopn 13478 fiinbas 13519 topbas 13537 topcld 13579 ntrtop 13598 opnneissb 13625 opnssneib 13626 opnneiid 13634 idcn 13682 cnconst2 13703 lmres 13718 retopbas 13993 cnopncntop 14007 abscncf 14042 recncf 14043 imcncf 14044 cjcncf 14045 mulc1cncf 14046 cncfcn1cntop 14051 cncfmpt2fcntop 14055 addccncf 14056 cdivcncfap 14057 negfcncf 14059 expcncf 14062 cnrehmeocntop 14063 cnlimcim 14110 cnlimc 14111 cnlimci 14112 dvcnp2cntop 14133 dvcn 14134 dvef 14158 efcn 14159 |
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