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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 3081 | . 2 ⊢ (𝐴 ⊆ 𝐵 ↔ ∀𝑥(𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵)) | |
2 | ssriv.1 | . 2 ⊢ (𝑥 ∈ 𝐴 → 𝑥 ∈ 𝐵) | |
3 | 1, 2 | mpgbir 1429 | 1 ⊢ 𝐴 ⊆ 𝐵 |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∈ wcel 1480 ⊆ wss 3066 |
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 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-11 1484 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 |
This theorem depends on definitions: df-bi 116 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-in 3072 df-ss 3079 |
This theorem is referenced by: ssid 3112 ssv 3114 difss 3197 ssun1 3234 inss1 3291 unssdif 3306 inssdif 3307 unssin 3310 inssun 3311 difindiss 3325 undif3ss 3332 0ss 3396 difprsnss 3653 snsspw 3686 pwprss 3727 pwtpss 3728 uniin 3751 iuniin 3818 iundif2ss 3873 iunpwss 3899 pwuni 4111 pwunss 4200 omsson 4521 limom 4522 xpsspw 4646 dmin 4742 dmrnssfld 4797 dmcoss 4803 dminss 4948 imainss 4949 dmxpss 4964 rnxpid 4968 mapsspm 6569 pmsspw 6570 uniixp 6608 snexxph 6831 djuss 6948 enq0enq 7232 nqnq0pi 7239 nqnq0 7242 apsscn 8402 sup3exmid 8708 zssre 9054 zsscn 9055 nnssz 9064 uzssz 9338 divfnzn 9406 zssq 9412 qssre 9415 rpssre 9445 ixxssxr 9676 ixxssixx 9678 iooval2 9691 ioossre 9711 rge0ssre 9753 fz1ssnn 9829 fzssuz 9838 fzssp1 9840 uzdisj 9866 fz0ssnn0 9889 nn0disj 9908 fzossfz 9935 fzouzsplit 9949 fzossnn 9959 fzo0ssnn0 9985 seq3coll 10578 fclim 11056 infssuzcldc 11633 prmssnn 11782 restsspw 12119 unitg 12220 cldss2 12264 blssioo 12703 tgioo 12704 limccl 12786 limcresi 12793 dvef 12845 bj-omsson 13149 |
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