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| Mirrors > Home > MPE Home > Th. List > subsubrg2 | Structured version Visualization version GIF version | ||
| Description: The set of subrings of a subring are the smaller subrings. (Contributed by Stefan O'Rear, 9-Mar-2015.) |
| Ref | Expression |
|---|---|
| subsubrg.s | ⊢ 𝑆 = (𝑅 ↾s 𝐴) |
| Ref | Expression |
|---|---|
| subsubrg2 | ⊢ (𝐴 ∈ (SubRing‘𝑅) → (SubRing‘𝑆) = ((SubRing‘𝑅) ∩ 𝒫 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | subsubrg.s | . . . 4 ⊢ 𝑆 = (𝑅 ↾s 𝐴) | |
| 2 | 1 | subsubrg 20679 | . . 3 ⊢ (𝐴 ∈ (SubRing‘𝑅) → (𝑎 ∈ (SubRing‘𝑆) ↔ (𝑎 ∈ (SubRing‘𝑅) ∧ 𝑎 ⊆ 𝐴))) |
| 3 | elin 3929 | . . . 4 ⊢ (𝑎 ∈ ((SubRing‘𝑅) ∩ 𝒫 𝐴) ↔ (𝑎 ∈ (SubRing‘𝑅) ∧ 𝑎 ∈ 𝒫 𝐴)) | |
| 4 | velpw 4569 | . . . . 5 ⊢ (𝑎 ∈ 𝒫 𝐴 ↔ 𝑎 ⊆ 𝐴) | |
| 5 | 4 | anbi2i 634 | . . . 4 ⊢ ((𝑎 ∈ (SubRing‘𝑅) ∧ 𝑎 ∈ 𝒫 𝐴) ↔ (𝑎 ∈ (SubRing‘𝑅) ∧ 𝑎 ⊆ 𝐴)) |
| 6 | 3, 5 | bitr2i 279 | . . 3 ⊢ ((𝑎 ∈ (SubRing‘𝑅) ∧ 𝑎 ⊆ 𝐴) ↔ 𝑎 ∈ ((SubRing‘𝑅) ∩ 𝒫 𝐴)) |
| 7 | 2, 6 | bitrdi 290 | . 2 ⊢ (𝐴 ∈ (SubRing‘𝑅) → (𝑎 ∈ (SubRing‘𝑆) ↔ 𝑎 ∈ ((SubRing‘𝑅) ∩ 𝒫 𝐴))) |
| 8 | 7 | eqrdv 2767 | 1 ⊢ (𝐴 ∈ (SubRing‘𝑅) → (SubRing‘𝑆) = ((SubRing‘𝑅) ∩ 𝒫 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1567 ∈ wcel 2149 ∩ cin 3912 ⊆ wss 3913 𝒫 cpw 4564 ‘cfv 6533 (class class class)co 7408 ↾s cress 17286 SubRingcsubrg 20650 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 ax-cnex 11152 ax-resscn 11153 ax-1cn 11154 ax-icn 11155 ax-addcl 11156 ax-addrcl 11157 ax-mulcl 11158 ax-mulrcl 11159 ax-mulcom 11160 ax-addass 11161 ax-mulass 11162 ax-distr 11163 ax-i2m1 11164 ax-1ne0 11165 ax-1rid 11166 ax-rnegex 11167 ax-rrecex 11168 ax-cnre 11169 ax-pre-lttri 11170 ax-pre-lttrn 11171 ax-pre-ltadd 11172 ax-pre-mulgt0 11173 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11241 df-mnf 11242 df-xr 11243 df-ltxr 11244 df-le 11245 df-sub 11439 df-neg 11440 df-nn 12230 df-2 12299 df-3 12300 df-sets 17220 df-slot 17238 df-ndx 17250 df-base 17266 df-ress 17287 df-plusg 17319 df-mulr 17320 df-0g 17490 df-mgm 18694 df-sgrp 18773 df-mnd 18789 df-subg 19185 df-mgp 20213 df-ur 20260 df-ring 20313 df-subrg 20651 |
| This theorem is referenced by: evlseu 22199 |
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