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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 5975 opabbrex 6065 funexw 6274 opabex2 6357 f1imaen2g 6967 pw2f1odclem 7020 fiss 7176 genipv 7729 suplocexprlemlub 7944 hashfacen 11101 ovshftex 11397 strslssd 13147 ressbas2d 13169 ressval3d 13173 ressabsg 13177 restid2 13349 ptex 13365 prdsval 13374 prdsbaslemss 13375 divsfval 13429 divsfvalg 13430 igsumvalx 13490 issubmnd 13543 ress0g 13544 issubg2m 13794 releqgg 13825 eqgex 13826 eqgfval 13827 isghm 13848 ringidss 14061 dvdsrvald 14126 dvdsrex 14131 unitgrp 14149 unitabl 14150 unitlinv 14159 unitrinv 14160 dvrfvald 14166 rdivmuldivd 14177 invrpropdg 14182 rhmunitinv 14211 subrgugrp 14273 aprval 14315 aprap 14319 sralemg 14471 srascag 14475 sravscag 14476 sraipg 14477 sraex 14479 2basgeng 14825 cnrest2 14979 cnptopresti 14981 cnptoprest 14982 cnptoprest2 14983 cnmpt2res 15040 psmetres2 15076 xmetres2 15122 limccnp2lem 15419 limccnp2cntop 15420 dvfvalap 15424 dvmulxxbr 15445 dvaddxx 15446 dvmulxx 15447 dviaddf 15448 dvimulf 15449 dvcoapbr 15450 dvmptaddx 15462 dvmptmulx 15463 plycj 15504 wksfval 16192 wlkex 16195 trlsfvalg 16253 trlsex 16257 eupthsg 16315 |
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