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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 11296 hashfacen 11298 hashf1lem1 11299 ovshftex 11598 strslssd 13448 ressbas2d 13471 ressval3d 13475 ressabsg 13479 restid2 13651 ptex 13667 divsfval 13698 divsfvalg 13699 gzsumvalx 13758 issubmnd 13804 ress0g 13805 issubg2m 14041 releqgg 14072 eqgex 14073 eqgfval 14074 isghm 14095 prdsval 14222 prdsbaslemss 14223 ringidss 14383 dvdsrvald 14449 dvdsrex 14454 unitgrp 14472 unitabl 14473 unitlinv 14482 unitrinv 14483 dvrfvald 14489 rdivmuldivd 14500 invrpropdg 14505 rhmunitinv 14534 subrgugrp 14597 aprval 14640 aprap 14647 aprprop 14650 sralemg 14824 srascag 14828 sravscag 14829 sraipg 14830 sraex 14832 2basgeng 15232 cnrest2 15386 cnptopresti 15388 cnptoprest 15389 cnptoprest2 15390 cnmpt2res 15447 psmetres2 15483 xmetres2 15529 limccnp2lem 15826 limccnp2cntop 15827 dvfvalap 15831 dvmulxxbr 15852 dvaddxx 15853 dvmulxx 15854 dviaddf 15855 dvimulf 15856 dvcoapbr 15857 dvmptaddx 15869 dvmptmulx 15870 plycj 15911 wksfval 16661 wlkex 16664 trlsfvalg 16722 trlsex 16726 eupthsg 16784 |
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