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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 3413 | . . 3 ⊢ {𝑥 ∈ 𝐴 ∣ 𝜑} = {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} | |
| 2 | 1 | sseq2i 3960 | . 2 ⊢ (𝐵 ⊆ {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ 𝐵 ⊆ {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)}) |
| 3 | ssab 4011 | . 2 ⊢ (𝐵 ⊆ {𝑥 ∣ (𝑥 ∈ 𝐴 ∧ 𝜑)} ↔ ∀𝑥(𝑥 ∈ 𝐵 → (𝑥 ∈ 𝐴 ∧ 𝜑))) | |
| 4 | dfss3 3920 | . . . 4 ⊢ (𝐵 ⊆ 𝐴 ↔ ∀𝑥 ∈ 𝐵 𝑥 ∈ 𝐴) | |
| 5 | 4 | anbi1i 636 | . . 3 ⊢ ((𝐵 ⊆ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑) ↔ (∀𝑥 ∈ 𝐵 𝑥 ∈ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑)) |
| 6 | r19.26 3122 | . . 3 ⊢ (∀𝑥 ∈ 𝐵 (𝑥 ∈ 𝐴 ∧ 𝜑) ↔ (∀𝑥 ∈ 𝐵 𝑥 ∈ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑)) | |
| 7 | df-ral 3077 | . . 3 ⊢ (∀𝑥 ∈ 𝐵 (𝑥 ∈ 𝐴 ∧ 𝜑) ↔ ∀𝑥(𝑥 ∈ 𝐵 → (𝑥 ∈ 𝐴 ∧ 𝜑))) | |
| 8 | 5, 6, 7 | 3bitr2ri 303 | . 2 ⊢ (∀𝑥(𝑥 ∈ 𝐵 → (𝑥 ∈ 𝐴 ∧ 𝜑)) ↔ (𝐵 ⊆ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑)) |
| 9 | 2, 3, 8 | 3bitri 300 | 1 ⊢ (𝐵 ⊆ {𝑥 ∈ 𝐴 ∣ 𝜑} ↔ (𝐵 ⊆ 𝐴 ∧ ∀𝑥 ∈ 𝐵 𝜑)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∀wal 1568 ∈ wcel 2145 {cab 2738 ∀wral 3076 {crab 3412 ⊆ wss 3899 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-tru 1573 df-ex 1813 df-nf 1817 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ral 3077 df-rab 3413 df-ss 3916 |
| This theorem is used by: ssrabdv 4021 omssnlim 7878 ordtypelem2 9492 ordtypelem10 9500 card2inf 9528 r0weon 10016 ramtlecl 17093 sscntz 19454 ppttop 23233 epttop 23235 cmpcov2 23616 tgcmp 23627 xkoinjcn 23914 fbssfi 24064 filssufilg 24138 uffixfr 24150 tmdgsum2 24323 symgtgp 24333 ghmcnp 24342 blcls 24733 clsocv 25479 lhop1lem 26241 ressatans 27172 axcontlem3 29424 axcontlem4 29425 lfuhgr 29606 ldgenpisyslem3 34677 ldgenpisys 34678 imambfm 34774 fineqvnttrclse 35651 connpconn 35815 cvmlift2lem11 35893 cvmlift2lem12 35894 bj-rabtr 37675 hbtlem6 43971 usgrexmpl1lem 48938 usgrexmpl2lem 48943 |
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