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| Mirrors > Home > MPE Home > Th. List > issubgrpd2 | Structured version Visualization version GIF version | ||
| Description: Prove a subgroup by closure (definition version). (Contributed by Stefan O'Rear, 7-Dec-2014.) |
| Ref | Expression |
|---|---|
| issubgrpd.s | ⊢ (𝜑 → 𝑆 = (𝐼 ↾s 𝐷)) |
| issubgrpd.z | ⊢ (𝜑 → 0 = (0g‘𝐼)) |
| issubgrpd.p | ⊢ (𝜑 → + = (+g‘𝐼)) |
| issubgrpd.ss | ⊢ (𝜑 → 𝐷 ⊆ (Base‘𝐼)) |
| issubgrpd.zcl | ⊢ (𝜑 → 0 ∈ 𝐷) |
| issubgrpd.acl | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐷) → (𝑥 + 𝑦) ∈ 𝐷) |
| issubgrpd.ncl | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → ((invg‘𝐼)‘𝑥) ∈ 𝐷) |
| issubgrpd.g | ⊢ (𝜑 → 𝐼 ∈ Grp) |
| Ref | Expression |
|---|---|
| issubgrpd2 | ⊢ (𝜑 → 𝐷 ∈ (SubGrp‘𝐼)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | issubgrpd.ss | . 2 ⊢ (𝜑 → 𝐷 ⊆ (Base‘𝐼)) | |
| 2 | issubgrpd.zcl | . . 3 ⊢ (𝜑 → 0 ∈ 𝐷) | |
| 3 | 2 | ne0d 4288 | . 2 ⊢ (𝜑 → 𝐷 ≠ ∅) |
| 4 | issubgrpd.p | . . . . . . . 8 ⊢ (𝜑 → + = (+g‘𝐼)) | |
| 5 | 4 | oveqd 7430 | . . . . . . 7 ⊢ (𝜑 → (𝑥 + 𝑦) = (𝑥(+g‘𝐼)𝑦)) |
| 6 | 5 | ad2antrr 739 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐷) ∧ 𝑦 ∈ 𝐷) → (𝑥 + 𝑦) = (𝑥(+g‘𝐼)𝑦)) |
| 7 | issubgrpd.acl | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷 ∧ 𝑦 ∈ 𝐷) → (𝑥 + 𝑦) ∈ 𝐷) | |
| 8 | 7 | 3expa 1136 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐷) ∧ 𝑦 ∈ 𝐷) → (𝑥 + 𝑦) ∈ 𝐷) |
| 9 | 6, 8 | eqeltrrd 2861 | . . . . 5 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐷) ∧ 𝑦 ∈ 𝐷) → (𝑥(+g‘𝐼)𝑦) ∈ 𝐷) |
| 10 | 9 | ralrimiva 3154 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → ∀𝑦 ∈ 𝐷 (𝑥(+g‘𝐼)𝑦) ∈ 𝐷) |
| 11 | issubgrpd.ncl | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → ((invg‘𝐼)‘𝑥) ∈ 𝐷) | |
| 12 | 10, 11 | jca 521 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐷) → (∀𝑦 ∈ 𝐷 (𝑥(+g‘𝐼)𝑦) ∈ 𝐷 ∧ ((invg‘𝐼)‘𝑥) ∈ 𝐷)) |
| 13 | 12 | ralrimiva 3154 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐷 (∀𝑦 ∈ 𝐷 (𝑥(+g‘𝐼)𝑦) ∈ 𝐷 ∧ ((invg‘𝐼)‘𝑥) ∈ 𝐷)) |
| 14 | issubgrpd.g | . . 3 ⊢ (𝜑 → 𝐼 ∈ Grp) | |
| 15 | eqid 2760 | . . . 4 ⊢ (Base‘𝐼) = (Base‘𝐼) | |
| 16 | eqid 2760 | . . . 4 ⊢ (+g‘𝐼) = (+g‘𝐼) | |
| 17 | eqid 2760 | . . . 4 ⊢ (invg‘𝐼) = (invg‘𝐼) | |
| 18 | 15, 16, 17 | issubg2 19265 | . . 3 ⊢ (𝐼 ∈ Grp → (𝐷 ∈ (SubGrp‘𝐼) ↔ (𝐷 ⊆ (Base‘𝐼) ∧ 𝐷 ≠ ∅ ∧ ∀𝑥 ∈ 𝐷 (∀𝑦 ∈ 𝐷 (𝑥(+g‘𝐼)𝑦) ∈ 𝐷 ∧ ((invg‘𝐼)‘𝑥) ∈ 𝐷)))) |
| 19 | 14, 18 | syl 18 | . 2 ⊢ (𝜑 → (𝐷 ∈ (SubGrp‘𝐼) ↔ (𝐷 ⊆ (Base‘𝐼) ∧ 𝐷 ≠ ∅ ∧ ∀𝑥 ∈ 𝐷 (∀𝑦 ∈ 𝐷 (𝑥(+g‘𝐼)𝑦) ∈ 𝐷 ∧ ((invg‘𝐼)‘𝑥) ∈ 𝐷)))) |
| 20 | 1, 3, 13, 19 | mpbir3and 1361 | 1 ⊢ (𝜑 → 𝐷 ∈ (SubGrp‘𝐼)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∧ w3a 1103 = wceq 1570 ∈ wcel 2145 ≠ wne 2955 ∀wral 3076 ⊆ wss 3899 ∅c0 4279 ‘cfv 6533 (class class class)co 7413 Basecbs 17301 ↾s cress 17322 +gcplusg 17342 0gc0g 17524 Grpcgrp 19057 invgcminusg 19058 SubGrpcsubg 19243 |
| 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 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 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 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7863 df-2nd 7987 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-er 8696 df-en 8953 df-dom 8954 df-sdom 8955 df-pnf 11269 df-mnf 11270 df-xr 11271 df-ltxr 11272 df-le 11273 df-sub 11467 df-neg 11468 df-nn 12258 df-2 12327 df-sets 17256 df-slot 17274 df-ndx 17286 df-base 17302 df-ress 17323 df-plusg 17355 df-0g 17526 df-mgm 18730 df-sgrp 18821 df-mnd 18837 df-grp 19060 df-minusg 19061 df-subg 19246 |
| This theorem is used by: issubgrpd 19267 symgsssg 19594 symgfisg 19595 issubrgd 21373 dsmmsubg 21956 nsgmgclem 33840 |
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