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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 514 | . 2 ⊢ (𝜑 → (𝐴 ⊆ 𝐵 ∧ 𝐴 ⊆ 𝐶)) |
4 | ssin 4207 | . 2 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐴 ⊆ 𝐶) ↔ 𝐴 ⊆ (𝐵 ∩ 𝐶)) | |
5 | 3, 4 | sylib 220 | 1 ⊢ (𝜑 → 𝐴 ⊆ (𝐵 ∩ 𝐶)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 398 ∩ cin 3935 ⊆ wss 3936 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-v 3496 df-in 3943 df-ss 3952 |
This theorem is referenced by: mreexexlem3d 16917 isacs1i 16928 rescabs 17103 funcres2c 17171 lsmmod 18801 gsumzres 19029 gsumzsubmcl 19038 gsum2d 19092 issubdrg 19560 lspdisj 19897 mplind 20282 ntrin 21669 elcls 21681 neitr 21788 restcls 21789 lmss 21906 xkoinjcn 22295 trfg 22499 trust 22838 utoptop 22843 restutop 22846 isngp2 23206 lebnumii 23570 causs 23901 dvreslem 24507 c1lip3 24596 ssjo 29224 dmdbr5 30085 mdslj2i 30097 mdsl2bi 30100 mdslmd1lem2 30103 mdsymlem5 30184 difininv 30279 bnj1286 32291 mclsind 32817 frrlem12 33134 frrlem13 33135 neiin 33680 topmeet 33712 fnemeet2 33715 bj-elpwg 34348 bj-restpw 34386 bj-restb 34388 bj-restuni2 34392 idresssidinxp 35581 pmod1i 36999 dihmeetlem1N 38441 dihglblem5apreN 38442 dochdmj1 38541 mapdin 38813 baerlem3lem2 38861 baerlem5alem2 38862 baerlem5blem2 38863 trrelind 40059 isotone2 40448 nzin 40699 inmap 41521 islptre 41949 limccog 41950 limcresiooub 41972 limcresioolb 41973 limsupresxr 42096 liminfresxr 42097 liminfvalxr 42113 fourierdlem48 42488 fourierdlem49 42489 fourierdlem113 42553 pimiooltgt 43038 pimdecfgtioc 43042 pimincfltioc 43043 pimdecfgtioo 43044 pimincfltioo 43045 sssmf 43064 smflimlem2 43097 smfsuplem1 43134 setrec2fun 44844 |
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