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| Mirrors > Home > MPE Home > Th. List > ssrab | Structured version Visualization version GIF version | ||
| Description: Subclass of a restricted class abstraction. (Contributed by NM, 16-Aug-2006.) |
| Ref | Expression |
|---|---|
| ssrab | ⊢ (𝐵 ⊆ {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ (𝐵 ⊆ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-rab 3416 | . . 3 ⊢ {𝑥 ∈ 𝐴 ∣ 𝜑} = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} | |
| 2 | 1 | sseq2i 3988 | . 2 ⊢ (𝐵 ⊆ {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ 𝐵 ⊆ {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)}) |
| 3 | ssab 4039 | . 2 ⊢ (𝐵 ⊆ {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ↔ ∀𝑥(𝑥 ∈ 𝐵 → (𝑥 ∈ 𝐴 ∧ 𝜑))) | |
| 4 | dfss3 3947 | . . . 4 ⊢ (𝐵 ⊆ 𝐴 ↔ ∀𝑥 ∈ 𝐵 𝑥 ∈ 𝐴) | |
| 5 | 4 | anbi1i 624 | . . 3 ⊢ ((𝐵 ⊆ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑) ↔ (∀𝑥 ∈ 𝐵 𝑥 ∈ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑)) |
| 6 | r19.26 3098 | . . 3 ⊢ (∀𝑥 ∈ 𝐵 (𝑥 ∈ 𝐴 ∧ 𝜑) ↔ (∀𝑥 ∈ 𝐵 𝑥 ∈ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑)) | |
| 7 | df-ral 3052 | . . 3 ⊢ (∀𝑥 ∈ 𝐵 (𝑥 ∈ 𝐴 ∧ 𝜑) ↔ ∀𝑥(𝑥 ∈ 𝐵 → (𝑥 ∈ 𝐴 ∧ 𝜑))) | |
| 8 | 5, 6, 7 | 3bitr2ri 300 | . 2 ⊢ (∀𝑥(𝑥 ∈ 𝐵 → (𝑥 ∈ 𝐴 ∧ 𝜑)) ↔ (𝐵 ⊆ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑)) |
| 9 | 2, 3, 8 | 3bitri 297 | 1 ⊢ (𝐵 ⊆ {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ (𝐵 ⊆ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∀wal 1538 ∈ wcel 2108 {cab 2713 ∀wral 3051 {crab 3415 ⊆ wss 3926 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-tru 1543 df-ex 1780 df-nf 1784 df-sb 2065 df-clab 2714 df-cleq 2727 df-clel 2809 df-nfc 2885 df-ral 3052 df-rab 3416 df-ss 3943 |
| This theorem is referenced by: ssrabdv 4049 omssnlim 7876 ordtypelem2 9533 ordtypelem10 9541 card2inf 9569 r0weon 10026 ramtlecl 17020 sscntz 19309 ppttop 22945 epttop 22947 cmpcov2 23328 tgcmp 23339 xkoinjcn 23625 fbssfi 23775 filssufilg 23849 uffixfr 23861 tmdgsum2 24034 symgtgp 24044 ghmcnp 24053 blcls 24445 clsocv 25202 lhop1lem 25970 ressatans 26896 axcontlem3 28945 axcontlem4 28946 ldgenpisyslem3 34196 ldgenpisys 34197 imambfm 34294 lfuhgr 35140 connpconn 35257 cvmlift2lem11 35335 cvmlift2lem12 35336 bj-rabtr 36948 hbtlem6 43153 usgrexmpl1lem 48025 usgrexmpl2lem 48030 |
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