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Mirrors > Home > ILE Home > Th. List > ssriv | GIF version |
Description: Inference based on subclass definition. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
ssriv.1 | ⊢ (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) |
Ref | Expression |
---|---|
ssriv | ⊢ 𝐴 ⊆ 𝐵 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | dfss2 3091 | . 2 ⊢ (𝐴 ⊆ 𝐵 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵)) | |
2 | ssriv.1 | . 2 ⊢ (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) | |
3 | 1, 2 | mpgbir 1430 | 1 ⊢ 𝐴 ⊆ 𝐵 |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∈ wcel 1481 ⊆ wss 3076 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-11 1485 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-in 3082 df-ss 3089 |
This theorem is referenced by: ssid 3122 ssv 3124 difss 3207 ssun1 3244 inss1 3301 unssdif 3316 inssdif 3317 unssin 3320 inssun 3321 difindiss 3335 undif3ss 3342 0ss 3406 difprsnss 3666 snsspw 3699 pwprss 3740 pwtpss 3741 uniin 3764 iuniin 3831 iundif2ss 3886 iunpwss 3912 pwuni 4124 pwunss 4213 omsson 4534 limom 4535 xpsspw 4659 dmin 4755 dmrnssfld 4810 dmcoss 4816 dminss 4961 imainss 4962 dmxpss 4977 rnxpid 4981 mapsspm 6584 pmsspw 6585 uniixp 6623 snexxph 6846 djuss 6963 enq0enq 7263 nqnq0pi 7270 nqnq0 7273 apsscn 8433 sup3exmid 8739 zssre 9085 zsscn 9086 nnssz 9095 uzssz 9369 divfnzn 9440 zssq 9446 qssre 9449 rpssre 9481 ixxssxr 9713 ixxssixx 9715 iooval2 9728 ioossre 9748 rge0ssre 9790 fz1ssnn 9867 fzssuz 9876 fzssp1 9878 uzdisj 9904 fz0ssnn0 9927 nn0disj 9946 fzossfz 9973 fzouzsplit 9987 fzossnn 9997 fzo0ssnn0 10023 seq3coll 10617 fclim 11095 infssuzcldc 11680 prmssnn 11829 restsspw 12169 unitg 12270 cldss2 12314 blssioo 12753 tgioo 12754 limccl 12836 limcresi 12843 dvef 12896 reeff1o 12902 bj-omsson 13331 |
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