Theorem submtmd 21718

Description: A submonoid of a topological monoid is a topological monoid. (Contributed by Mario Carneiro, 6-Oct-2015.)

Hypothesis

Ref	Expression
subgtgp.h	⊢ 𝐻 = (𝐺 ↾s 𝑆)

Assertion

Ref	Expression
submtmd	⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → 𝐻 ∈ TopMnd)

Proof of Theorem submtmd

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		subgtgp.h	. . . 4 ⊢ 𝐻 = (𝐺 ↾s 𝑆)
2	1	submmnd 17177	. . 3 ⊢ (𝑆 ∈ (SubMnd‘𝐺) → 𝐻 ∈ Mnd)
3	2	adantl 481	. 2 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → 𝐻 ∈ Mnd)
4		tmdtps 21690	. . . 4 ⊢ (𝐺 ∈ TopMnd → 𝐺 ∈ TopSp)
5		resstps 20801	. . . 4 ⊢ ((𝐺 ∈ TopSp ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (𝐺 ↾s 𝑆) ∈ TopSp)
6	4, 5	sylan 487	. . 3 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (𝐺 ↾s 𝑆) ∈ TopSp)
7	1, 6	syl5eqel 2692	. 2 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → 𝐻 ∈ TopSp)
8	1	submbas 17178	. . . . . . 7 ⊢ (𝑆 ∈ (SubMnd‘𝐺) → 𝑆 = (Base‘𝐻))
9	8	adantl 481	. . . . . 6 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → 𝑆 = (Base‘𝐻))
10		eqid 2610	. . . . . . . . 9 ⊢ (+g‘𝐺) = (+g‘𝐺)
11	1, 10	ressplusg 15818	. . . . . . . 8 ⊢ (𝑆 ∈ (SubMnd‘𝐺) → (+g‘𝐺) = (+g‘𝐻))
12	11	adantl 481	. . . . . . 7 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (+g‘𝐺) = (+g‘𝐻))
13	12	oveqd 6566	. . . . . 6 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (𝑥(+g‘𝐺)𝑦) = (𝑥(+g‘𝐻)𝑦))
14	9, 9, 13	mpt2eq123dv 6615	. . . . 5 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (𝑥 ∈ 𝑆, 𝑦 ∈ 𝑆 ↦ (𝑥(+g‘𝐺)𝑦)) = (𝑥 ∈ (Base‘𝐻), 𝑦 ∈ (Base‘𝐻) ↦ (𝑥(+g‘𝐻)𝑦)))
15		eqid 2610	. . . . . 6 ⊢ (Base‘𝐻) = (Base‘𝐻)
16		eqid 2610	. . . . . 6 ⊢ (+g‘𝐻) = (+g‘𝐻)
17		eqid 2610	. . . . . 6 ⊢ (+𝑓‘𝐻) = (+𝑓‘𝐻)
18	15, 16, 17	plusffval 17070	. . . . 5 ⊢ (+𝑓‘𝐻) = (𝑥 ∈ (Base‘𝐻), 𝑦 ∈ (Base‘𝐻) ↦ (𝑥(+g‘𝐻)𝑦))
19	14, 18	syl6reqr 2663	. . . 4 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (+𝑓‘𝐻) = (𝑥 ∈ 𝑆, 𝑦 ∈ 𝑆 ↦ (𝑥(+g‘𝐺)𝑦)))
20		eqid 2610	. . . . 5 ⊢ ((TopOpen‘𝐺) ↾t 𝑆) = ((TopOpen‘𝐺) ↾t 𝑆)
21		eqid 2610	. . . . . . 7 ⊢ (TopOpen‘𝐺) = (TopOpen‘𝐺)
22		eqid 2610	. . . . . . 7 ⊢ (Base‘𝐺) = (Base‘𝐺)
23	21, 22	tmdtopon 21695	. . . . . 6 ⊢ (𝐺 ∈ TopMnd → (TopOpen‘𝐺) ∈ (TopOn‘(Base‘𝐺)))
24	23	adantr 480	. . . . 5 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (TopOpen‘𝐺) ∈ (TopOn‘(Base‘𝐺)))
25	22	submss 17173	. . . . . 6 ⊢ (𝑆 ∈ (SubMnd‘𝐺) → 𝑆 ⊆ (Base‘𝐺))
26	25	adantl 481	. . . . 5 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → 𝑆 ⊆ (Base‘𝐺))
27		eqid 2610	. . . . . . . 8 ⊢ (+𝑓‘𝐺) = (+𝑓‘𝐺)
28	22, 10, 27	plusffval 17070	. . . . . . 7 ⊢ (+𝑓‘𝐺) = (𝑥 ∈ (Base‘𝐺), 𝑦 ∈ (Base‘𝐺) ↦ (𝑥(+g‘𝐺)𝑦))
29	21, 27	tmdcn 21697	. . . . . . 7 ⊢ (𝐺 ∈ TopMnd → (+𝑓‘𝐺) ∈ (((TopOpen‘𝐺) ×t (TopOpen‘𝐺)) Cn (TopOpen‘𝐺)))
30	28, 29	syl5eqelr 2693	. . . . . 6 ⊢ (𝐺 ∈ TopMnd → (𝑥 ∈ (Base‘𝐺), 𝑦 ∈ (Base‘𝐺) ↦ (𝑥(+g‘𝐺)𝑦)) ∈ (((TopOpen‘𝐺) ×t (TopOpen‘𝐺)) Cn (TopOpen‘𝐺)))
31	30	adantr 480	. . . . 5 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (𝑥 ∈ (Base‘𝐺), 𝑦 ∈ (Base‘𝐺) ↦ (𝑥(+g‘𝐺)𝑦)) ∈ (((TopOpen‘𝐺) ×t (TopOpen‘𝐺)) Cn (TopOpen‘𝐺)))
32	20, 24, 26, 20, 24, 26, 31	cnmpt2res 21290	. . . 4 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (𝑥 ∈ 𝑆, 𝑦 ∈ 𝑆 ↦ (𝑥(+g‘𝐺)𝑦)) ∈ ((((TopOpen‘𝐺) ↾t 𝑆) ×t ((TopOpen‘𝐺) ↾t 𝑆)) Cn (TopOpen‘𝐺)))
33	19, 32	eqeltrd 2688	. . 3 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (+𝑓‘𝐻) ∈ ((((TopOpen‘𝐺) ↾t 𝑆) ×t ((TopOpen‘𝐺) ↾t 𝑆)) Cn (TopOpen‘𝐺)))
34	15, 17	mndplusf 17132	. . . . . 6 ⊢ (𝐻 ∈ Mnd → (+𝑓‘𝐻):((Base‘𝐻) × (Base‘𝐻))⟶(Base‘𝐻))
35		frn 5966	. . . . . 6 ⊢ ((+𝑓‘𝐻):((Base‘𝐻) × (Base‘𝐻))⟶(Base‘𝐻) → ran (+𝑓‘𝐻) ⊆ (Base‘𝐻))
36	3, 34, 35	3syl 18	. . . . 5 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → ran (+𝑓‘𝐻) ⊆ (Base‘𝐻))
37	36, 9	sseqtr4d 3605	. . . 4 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → ran (+𝑓‘𝐻) ⊆ 𝑆)
38		cnrest2 20900	. . . 4 ⊢ (((TopOpen‘𝐺) ∈ (TopOn‘(Base‘𝐺)) ∧ ran (+𝑓‘𝐻) ⊆ 𝑆 ∧ 𝑆 ⊆ (Base‘𝐺)) → ((+𝑓‘𝐻) ∈ ((((TopOpen‘𝐺) ↾t 𝑆) ×t ((TopOpen‘𝐺) ↾t 𝑆)) Cn (TopOpen‘𝐺)) ↔ (+𝑓‘𝐻) ∈ ((((TopOpen‘𝐺) ↾t 𝑆) ×t ((TopOpen‘𝐺) ↾t 𝑆)) Cn ((TopOpen‘𝐺) ↾t 𝑆))))
39	24, 37, 26, 38	syl3anc 1318	. . 3 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → ((+𝑓‘𝐻) ∈ ((((TopOpen‘𝐺) ↾t 𝑆) ×t ((TopOpen‘𝐺) ↾t 𝑆)) Cn (TopOpen‘𝐺)) ↔ (+𝑓‘𝐻) ∈ ((((TopOpen‘𝐺) ↾t 𝑆) ×t ((TopOpen‘𝐺) ↾t 𝑆)) Cn ((TopOpen‘𝐺) ↾t 𝑆))))
40	33, 39	mpbid 221	. 2 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → (+𝑓‘𝐻) ∈ ((((TopOpen‘𝐺) ↾t 𝑆) ×t ((TopOpen‘𝐺) ↾t 𝑆)) Cn ((TopOpen‘𝐺) ↾t 𝑆)))
41	1, 21	resstopn 20800	. . 3 ⊢ ((TopOpen‘𝐺) ↾t 𝑆) = (TopOpen‘𝐻)
42	17, 41	istmd 21688	. 2 ⊢ (𝐻 ∈ TopMnd ↔ (𝐻 ∈ Mnd ∧ 𝐻 ∈ TopSp ∧ (+𝑓‘𝐻) ∈ ((((TopOpen‘𝐺) ↾t 𝑆) ×t ((TopOpen‘𝐺) ↾t 𝑆)) Cn ((TopOpen‘𝐺) ↾t 𝑆))))
43	3, 7, 40, 42	syl3anbrc 1239	1 ⊢ ((𝐺 ∈ TopMnd ∧ 𝑆 ∈ (SubMnd‘𝐺)) → 𝐻 ∈ TopMnd)

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   = wceq 1475   ∈ wcel 1977   ⊆ wss 3540   × cxp 5036  ran crn 5039  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ↦ cmpt2 6551  Basecbs 15695   ↾_s cress 15696  +_gcplusg 15768   ↾_t crest 15904  TopOpenctopn 15905  +_𝑓cplusf 17062  Mndcmnd 17117  SubMndcsubmnd 17157  TopOnctopon 20518  TopSpctps 20519   Cn ccn 20838   ×_t ctx 21173  TopMndctmd 21684

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-oadd 7451  df-er 7629  df-map 7746  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-fi 8200  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-2 10956  df-3 10957  df-4 10958  df-5 10959  df-6 10960  df-7 10961  df-8 10962  df-9 10963  df-ndx 15698  df-slot 15699  df-base 15700  df-sets 15701  df-ress 15702  df-plusg 15781  df-tset 15787  df-rest 15906  df-topn 15907  df-0g 15925  df-topgen 15927  df-plusf 17064  df-mgm 17065  df-sgrp 17107  df-mnd 17118  df-submnd 17159  df-top 20521  df-bases 20522  df-topon 20523  df-topsp 20524  df-cn 20841  df-tx 21175  df-tmd 21686

This theorem is referenced by:  subgtgp  21719  nrgtdrg  22307  iistmd  29276