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| Mirrors > Home > ILE Home > Th. List > subsubrg2 | 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 14407 | . . 3 ⊢ (𝐴 ∈ (SubRing‘𝑅) → (𝑎 ∈ (SubRing‘𝑆) ↔ (𝑎 ∈ (SubRing‘𝑅) ∧ 𝑎 ⊆ 𝐴))) |
| 3 | elin 3404 | . . . 4 ⊢ (𝑎 ∈ ((SubRing‘𝑅) ∩ 𝒫 𝐴) ↔ (𝑎 ∈ (SubRing‘𝑅) ∧ 𝑎 ∈ 𝒫 𝐴)) | |
| 4 | velpw 3678 | . . . . 5 ⊢ (𝑎 ∈ 𝒫 𝐴 ↔ 𝑎 ⊆ 𝐴) | |
| 5 | 4 | anbi2i 457 | . . . 4 ⊢ ((𝑎 ∈ (SubRing‘𝑅) ∧ 𝑎 ∈ 𝒫 𝐴) ↔ (𝑎 ∈ (SubRing‘𝑅) ∧ 𝑎 ⊆ 𝐴)) |
| 6 | 3, 5 | bitr2i 185 | . . 3 ⊢ ((𝑎 ∈ (SubRing‘𝑅) ∧ 𝑎 ⊆ 𝐴) ↔ 𝑎 ∈ ((SubRing‘𝑅) ∩ 𝒫 𝐴)) |
| 7 | 2, 6 | bitrdi 196 | . 2 ⊢ (𝐴 ∈ (SubRing‘𝑅) → (𝑎 ∈ (SubRing‘𝑆) ↔ 𝑎 ∈ ((SubRing‘𝑅) ∩ 𝒫 𝐴))) |
| 8 | 7 | eqrdv 2232 | 1 ⊢ (𝐴 ∈ (SubRing‘𝑅) → (SubRing‘𝑆) = ((SubRing‘𝑅) ∩ 𝒫 𝐴)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1398 ∈ wcel 2205 ∩ cin 3212 ⊆ wss 3213 𝒫 cpw 3671 ‘cfv 5354 (class class class)co 6052 ↾s cress 13230 SubRingcsubrg 14379 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 619 ax-in2 620 ax-io 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2207 ax-14 2208 ax-ext 2216 ax-sep 4230 ax-pow 4289 ax-pr 4324 ax-un 4556 ax-setind 4661 ax-cnex 8220 ax-resscn 8221 ax-1cn 8222 ax-1re 8223 ax-icn 8224 ax-addcl 8225 ax-addrcl 8226 ax-mulcl 8227 ax-addcom 8229 ax-addass 8231 ax-i2m1 8234 ax-0lt1 8235 ax-0id 8237 ax-rnegex 8238 ax-pre-ltirr 8241 ax-pre-lttrn 8243 ax-pre-ltadd 8245 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2085 df-mo 2086 df-clab 2221 df-cleq 2227 df-clel 2230 df-nfc 2375 df-ne 2415 df-nel 2510 df-ral 2527 df-rex 2528 df-reu 2529 df-rmo 2530 df-rab 2531 df-v 2817 df-sbc 3045 df-csb 3141 df-dif 3215 df-un 3217 df-in 3219 df-ss 3226 df-nul 3511 df-pw 3673 df-sn 3697 df-pr 3698 df-op 3700 df-uni 3917 df-int 3952 df-br 4112 df-opab 4174 df-mpt 4175 df-id 4416 df-xp 4757 df-rel 4758 df-cnv 4759 df-co 4760 df-dm 4761 df-rn 4762 df-res 4763 df-ima 4764 df-iota 5314 df-fun 5356 df-fn 5357 df-fv 5362 df-riota 6005 df-ov 6055 df-oprab 6056 df-mpo 6057 df-pnf 8312 df-mnf 8313 df-ltxr 8315 df-inn 9240 df-2 9298 df-3 9299 df-ndx 13232 df-slot 13233 df-base 13235 df-sets 13236 df-iress 13237 df-plusg 13320 df-mulr 13321 df-0g 13488 df-mgm 13586 df-sgrp 13632 df-mnd 13647 df-subg 13904 df-mgp 14082 df-ur 14121 df-ring 14159 df-subrg 14381 |
| This theorem is referenced by: (None) |
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