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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 4272. (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 4272 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝐶) → 𝐴 ∈ V) | |
| 4 | 1, 2, 3 | syl2anc 415 | 1 ⊢ (𝜑 → 𝐴 ∈ V) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ∈ wcel 2209 Vcvv 2821 ⊆ wss 3220 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 ax-sep 4249 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 df-in 3226 df-ss 3233 |
| This theorem is used by: sepab 4278 iotaexab 5356 fex2 5556 riotaexg 6042 opabbrex 6132 funexw 6341 opabex2 6428 f1imaen2g 7080 pw2f1odclem 7134 fiss 7311 genipv 7876 suplocexprlemlub 8091 hashfibclem 11282 hashfacen 11284 hashf1lem1 11285 ovshftex 11584 strslssd 13399 ressbas2d 13422 ressval3d 13426 ressabsg 13430 restid2 13602 ptex 13618 divsfval 13649 divsfvalg 13650 gzsumvalx 13709 issubmnd 13755 ress0g 13756 issubg2m 13992 releqgg 14023 eqgex 14024 eqgfval 14025 isghm 14046 prdsval 14173 prdsbaslemss 14174 ringidss 14334 dvdsrvald 14400 dvdsrex 14405 unitgrp 14423 unitabl 14424 unitlinv 14433 unitrinv 14434 dvrfvald 14440 rdivmuldivd 14451 invrpropdg 14456 rhmunitinv 14485 subrgugrp 14548 aprval 14591 aprap 14598 aprprop 14601 sralemg 14775 srascag 14779 sravscag 14780 sraipg 14781 sraex 14783 2basgeng 15183 cnrest2 15337 cnptopresti 15339 cnptoprest 15340 cnptoprest2 15341 cnmpt2res 15398 psmetres2 15434 xmetres2 15480 limccnp2lem 15777 limccnp2cntop 15778 dvfvalap 15782 dvmulxxbr 15803 dvaddxx 15804 dvmulxx 15805 dviaddf 15806 dvimulf 15807 dvcoapbr 15808 dvmptaddx 15820 dvmptmulx 15821 plycj 15862 wksfval 16563 wlkex 16566 trlsfvalg 16624 trlsex 16628 eupthsg 16686 |
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