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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 4267. (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 4267 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝐶) → 𝐴 ∈ V) | |
| 4 | 1, 2, 3 | syl2anc 415 | 1 ⊢ (𝜑 → 𝐴 ∈ V) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∈ wcel 2209 Vcvv 2821 ⊆ wss 3220 |
| 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 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 4244 |
| This theorem 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 referenced by: sepab 4273 iotaexab 5351 fex2 5551 riotaexg 6032 opabbrex 6122 funexw 6331 opabex2 6418 f1imaen2g 7070 pw2f1odclem 7124 fiss 7301 genipv 7866 suplocexprlemlub 8081 hashfibclem 11260 hashfacen 11262 hashf1lem1 11263 ovshftex 11562 strslssd 13377 ressbas2d 13399 ressval3d 13403 ressabsg 13407 restid2 13579 ptex 13595 divsfval 13626 divsfvalg 13627 gzsumvalx 13686 issubmnd 13732 ress0g 13733 issubg2m 13969 releqgg 14000 eqgex 14001 eqgfval 14002 isghm 14023 prdsval 14150 prdsbaslemss 14151 ringidss 14307 dvdsrvald 14373 dvdsrex 14378 unitgrp 14396 unitabl 14397 unitlinv 14406 unitrinv 14407 dvrfvald 14413 rdivmuldivd 14424 invrpropdg 14429 rhmunitinv 14458 subrgugrp 14521 aprval 14564 aprap 14571 aprprop 14574 sralemg 14747 srascag 14751 sravscag 14752 sraipg 14753 sraex 14755 2basgeng 15106 cnrest2 15260 cnptopresti 15262 cnptoprest 15263 cnptoprest2 15264 cnmpt2res 15321 psmetres2 15357 xmetres2 15403 limccnp2lem 15700 limccnp2cntop 15701 dvfvalap 15705 dvmulxxbr 15726 dvaddxx 15727 dvmulxx 15728 dviaddf 15729 dvimulf 15730 dvcoapbr 15731 dvmptaddx 15743 dvmptmulx 15744 plycj 15785 wksfval 16477 wlkex 16480 trlsfvalg 16538 trlsex 16542 eupthsg 16600 |
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