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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 515 | . 2 ⊢ (𝜑 → (𝐴 ⊆ 𝐵 ∧ 𝐴 ⊆ 𝐶)) |
4 | ssin 4157 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ⊆ 𝐶) ↔ 𝐴 ⊆ (𝐵 ∩ 𝐶)) | |
5 | 3, 4 | sylib 221 | 1 ⊢ (𝜑 → 𝐴 ⊆ (𝐵 ∩ 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 399 ∩ cin 3880 ⊆ wss 3881 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-ex 1782 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-v 3443 df-in 3888 df-ss 3898 |
This theorem is referenced by: mreexexlem3d 16909 isacs1i 16920 rescabs 17095 funcres2c 17163 lsmmod 18793 gsumzres 19022 gsumzsubmcl 19031 gsum2d 19085 issubdrg 19553 lspdisj 19890 mplind 20741 ntrin 21666 elcls 21678 neitr 21785 restcls 21786 lmss 21903 xkoinjcn 22292 trfg 22496 trust 22835 utoptop 22840 restutop 22843 isngp2 23203 lebnumii 23571 causs 23902 dvreslem 24512 c1lip3 24602 ssjo 29230 dmdbr5 30091 mdslj2i 30103 mdsl2bi 30106 mdslmd1lem2 30109 mdsymlem5 30190 difininv 30288 idlsrgmulrssin 31066 bnj1286 32401 mclsind 32930 frrlem12 33247 frrlem13 33248 neiin 33793 topmeet 33825 fnemeet2 33828 bj-elpwg 34469 bj-restpw 34507 bj-restb 34509 bj-restuni2 34513 idresssidinxp 35726 pmod1i 37144 dihmeetlem1N 38586 dihglblem5apreN 38587 dochdmj1 38686 mapdin 38958 baerlem3lem2 39006 baerlem5alem2 39007 baerlem5blem2 39008 trrelind 40366 isotone2 40752 nzin 41022 inmap 41838 islptre 42261 limccog 42262 limcresiooub 42284 limcresioolb 42285 limsupresxr 42408 liminfresxr 42409 liminfvalxr 42425 fourierdlem48 42796 fourierdlem49 42797 fourierdlem113 42861 pimiooltgt 43346 pimdecfgtioc 43350 pimincfltioc 43351 pimdecfgtioo 43352 pimincfltioo 43353 sssmf 43372 smflimlem2 43405 smfsuplem1 43442 setrec2fun 45222 |
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