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Related theorems GIF version |
| Description: The subset of a set is also a set. |
| Ref | Expression |
|---|---|
| ssexi.1 | ⊢ B ∈ V |
| ssexi.2 | ⊢ A ⊆ B |
| Ref | Expression |
|---|---|
| ssexi | ⊢ A ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssexi.2 | . 2 ⊢ A ⊆ B | |
| 2 | ssexi.1 | . . 3 ⊢ B ∈ V | |
| 3 | 2 | ssex 2793 | . 2 ⊢ (A ⊆ B → A ∈ V) |
| 4 | 1, 3 | ax-mp 7 | 1 ⊢ A ∈ V |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 994 Vcvv 1857 ⊆ wss 2099 |
| This theorem is referenced by: zfausab 2797 snex 2826 ord3ex 2830 moabex 2844 opabex 3715 fvclex 3970 abrexexlem1 3972 abrexex 3974 oprabex 4079 pw2en 4587 sbthlem2 4593 phplem2 4656 phplem4 4658 php 4660 pssnn 4681 abfii2 4705 abfii4 4707 inf3lem3 4760 hta 4874 aceq3 4879 aceq5lem4 4884 aceq6b 4888 numthlem 4929 zorn2lem1 4934 brdom7disj 4950 brdom6disj 4951 niex 5163 enqex 5202 npex 5245 enrex 5332 reex 5466 nnex 6078 nn0ex 6273 zex 6312 qex 6407 sumex 7184 infxpidmlem9 7772 infmap2lem2 7792 gch-kn 7799 subbas 7856 bcthlem15 8224 issubg 8358 issubgi 8364 sspval 8636 ajfval 8724 shex 9353 chex 9371 hmopex 10082 stoiglem 11063 issubcat 11299 ordtypelem1 11427 ordtypelem7 11433 hartog 11436 cptclsscpt 11489 2ndcctbss 11539 neibastop2lem1 11580 neibastop2lem4 11583 filssufil 11656 metsstop 11909 heiborlem23 12033 heiborlem25 12035 heiborlem26 12036 heiborlem29 12039 heiborlem40 12050 phtpcval 12100 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 998 ax-gen 999 ax-8 1000 ax-10 1002 ax-12 1004 ax-17 1007 ax-4 1009 ax-5o 1011 ax-6o 1014 ax-9o 1159 ax-10o 1177 ax-16 1247 ax-11o 1255 ax-ext 1500 ax-sep 2777 |
| This theorem depends on definitions: df-bi 145 df-an 223 df-ex 1017 df-sb 1209 df-clab 1506 df-cleq 1511 df-clel 1514 df-v 1858 df-in 2103 df-ss 2105 |