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| Mirrors > Home > ILE Home > Th. List > ssexd | GIF version | ||
| Description: A subclass of a set is a set. Deduction form of ssexg 4249. (Contributed by David Moews, 1-May-2017.) |
| Ref | Expression |
|---|---|
| ssexd.1 | ⊢ (𝜑 → 𝐵 ∈ 𝐶) |
| ssexd.2 | ⊢ (𝜑 → 𝐴 ⊆ 𝐵) |
| Ref | Expression |
|---|---|
| ssexd | ⊢ (𝜑 → 𝐴 ∈ V) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ssexd.2 | . 2 ⊢ (𝜑 → 𝐴 ⊆ 𝐵) | |
| 2 | ssexd.1 | . 2 ⊢ (𝜑 → 𝐵 ∈ 𝐶) | |
| 3 | ssexg 4249 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝐶) → 𝐴 ∈ V) | |
| 4 | 1, 2, 3 | syl2anc 411 | 1 ⊢ (𝜑 → 𝐴 ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2203 Vcvv 2813 ⊆ wss 3211 |
| 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-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-ext 2214 ax-sep 4228 |
| This theorem depends on definitions: df-bi 117 df-tru 1401 df-nf 1510 df-sb 1812 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-v 2815 df-in 3217 df-ss 3224 |
| This theorem is referenced by: iotaexab 5331 fex2 5531 riotaexg 6007 opabbrex 6097 funexw 6305 opabex2 6388 f1imaen2g 7033 pw2f1odclem 7087 fiss 7264 genipv 7824 suplocexprlemlub 8039 hashfibclem 11206 hashfacen 11208 ovshftex 11504 strslssd 13259 ressbas2d 13281 ressval3d 13285 ressabsg 13289 restid2 13461 ptex 13477 prdsval 13486 prdsbaslemss 13487 divsfval 13541 divsfvalg 13542 igsumvalx 13602 issubmnd 13655 ress0g 13656 issubg2m 13906 releqgg 13937 eqgex 13938 eqgfval 13939 isghm 13960 ringidss 14173 dvdsrvald 14238 dvdsrex 14243 unitgrp 14261 unitabl 14262 unitlinv 14271 unitrinv 14272 dvrfvald 14278 rdivmuldivd 14289 invrpropdg 14294 rhmunitinv 14323 subrgugrp 14385 aprval 14428 aprap 14432 sralemg 14586 srascag 14590 sravscag 14591 sraipg 14592 sraex 14594 2basgeng 14947 cnrest2 15101 cnptopresti 15103 cnptoprest 15104 cnptoprest2 15105 cnmpt2res 15162 psmetres2 15198 xmetres2 15244 limccnp2lem 15541 limccnp2cntop 15542 dvfvalap 15546 dvmulxxbr 15567 dvaddxx 15568 dvmulxx 15569 dviaddf 15570 dvimulf 15571 dvcoapbr 15572 dvmptaddx 15584 dvmptmulx 15585 plycj 15626 wksfval 16317 wlkex 16320 trlsfvalg 16378 trlsex 16382 eupthsg 16440 |
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