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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 4228. (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 4228 | . 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 2202 Vcvv 2802 ⊆ wss 3200 |
| 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 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 ax-sep 4207 |
| This theorem depends on definitions: df-bi 117 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-v 2804 df-in 3206 df-ss 3213 |
| This theorem is referenced by: iotaexab 5305 fex2 5503 riotaexg 5974 opabbrex 6064 funexw 6273 opabex2 6356 f1imaen2g 6966 pw2f1odclem 7019 fiss 7175 genipv 7728 suplocexprlemlub 7943 hashfacen 11099 ovshftex 11379 strslssd 13128 ressbas2d 13150 ressval3d 13154 ressabsg 13158 restid2 13330 ptex 13346 prdsval 13355 prdsbaslemss 13356 divsfval 13410 divsfvalg 13411 igsumvalx 13471 issubmnd 13524 ress0g 13525 issubg2m 13775 releqgg 13806 eqgex 13807 eqgfval 13808 isghm 13829 ringidss 14041 dvdsrvald 14106 dvdsrex 14111 unitgrp 14129 unitabl 14130 unitlinv 14139 unitrinv 14140 dvrfvald 14146 rdivmuldivd 14157 invrpropdg 14162 rhmunitinv 14191 subrgugrp 14253 aprval 14295 aprap 14299 sralemg 14451 srascag 14455 sravscag 14456 sraipg 14457 sraex 14459 2basgeng 14805 cnrest2 14959 cnptopresti 14961 cnptoprest 14962 cnptoprest2 14963 cnmpt2res 15020 psmetres2 15056 xmetres2 15102 limccnp2lem 15399 limccnp2cntop 15400 dvfvalap 15404 dvmulxxbr 15425 dvaddxx 15426 dvmulxx 15427 dviaddf 15428 dvimulf 15429 dvcoapbr 15430 dvmptaddx 15442 dvmptmulx 15443 plycj 15484 wksfval 16172 wlkex 16175 trlsfvalg 16233 trlsex 16237 eupthsg 16295 |
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