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Mirrors > Home > MPE Home > Th. List > ssind | Structured version Visualization version GIF version |
Description: A deduction showing that a subclass of two classes is a subclass of their intersection. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.) |
Ref | Expression |
---|---|
ssind.1 | ⊢ (𝜑 → 𝐴 ⊆ 𝐵) |
ssind.2 | ⊢ (𝜑 → 𝐴 ⊆ 𝐶) |
Ref | Expression |
---|---|
ssind | ⊢ (𝜑 → 𝐴 ⊆ (𝐵 ∩ 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ssind.1 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ 𝐵) | |
2 | ssind.2 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ 𝐶) | |
3 | 1, 2 | jca 553 | . 2 ⊢ (𝜑 → (𝐴 ⊆ 𝐵 ∧ 𝐴 ⊆ 𝐶)) |
4 | ssin 3797 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ⊆ 𝐶) ↔ 𝐴 ⊆ (𝐵 ∩ 𝐶)) | |
5 | 3, 4 | sylib 207 | 1 ⊢ (𝜑 → 𝐴 ⊆ (𝐵 ∩ 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 ∩ cin 3539 ⊆ wss 3540 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-v 3175 df-in 3547 df-ss 3554 |
This theorem is referenced by: mreexexlem3d 16129 isacs1i 16141 rescabs 16316 funcres2c 16384 lsmmod 17911 gsumzres 18133 gsumzsubmcl 18141 gsum2d 18194 issubdrg 18628 lspdisj 18946 mplind 19323 ntrin 20675 elcls 20687 neitr 20794 restcls 20795 lmss 20912 xkoinjcn 21300 trfg 21505 trust 21843 utoptop 21848 restutop 21851 isngp2 22211 lebnumii 22573 causs 22904 dvreslem 23479 c1lip3 23566 ssjo 27690 dmdbr5 28551 mdslj2i 28563 mdsl2bi 28566 mdslmd1lem2 28569 mdsymlem5 28650 bnj1286 30341 mclsind 30721 neiin 31497 topmeet 31529 fnemeet2 31532 bj-restpw 32226 bj-restb 32228 bj-restuni2 32232 pmod1i 34152 dihmeetlem1N 35597 dihglblem5apreN 35598 dochdmj1 35697 mapdin 35969 baerlem3lem2 36017 baerlem5alem2 36018 baerlem5blem2 36019 trrelind 36976 isotone2 37367 nzin 37539 inmap 38396 islptre 38686 limccog 38687 limcresiooub 38709 limcresioolb 38710 fourierdlem48 39047 fourierdlem49 39048 fourierdlem113 39112 pimiooltgt 39598 pimdecfgtioc 39602 pimincfltioc 39603 pimdecfgtioo 39604 pimincfltioo 39605 sssmf 39625 smflimlem2 39658 setrec2fun 42238 |
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