Theorem mrcidmd 16646

Description: Moore closure is idempotent. Deduction form of mrcidm 16639. (Contributed by David Moews, 1-May-2017.)

Hypotheses

Ref	Expression
mrcssidd.1	⊢ (𝜑 → 𝐴 ∈ (Moore‘𝑋))
mrcssidd.2	⊢ 𝑁 = (mrCls‘𝐴)
mrcssidd.3	⊢ (𝜑 → 𝑈 ⊆ 𝑋)

Assertion

Ref	Expression
mrcidmd	⊢ (𝜑 → (𝑁‘(𝑁‘𝑈)) = (𝑁‘𝑈))

Proof of Theorem mrcidmd

Step	Hyp	Ref	Expression
1		mrcssidd.1	. 2 ⊢ (𝜑 → 𝐴 ∈ (Moore‘𝑋))
2		mrcssidd.3	. 2 ⊢ (𝜑 → 𝑈 ⊆ 𝑋)
3		mrcssidd.2	. . 3 ⊢ 𝑁 = (mrCls‘𝐴)
4	3	mrcidm 16639	. 2 ⊢ ((𝐴 ∈ (Moore‘𝑋) ∧ 𝑈 ⊆ 𝑋) → (𝑁‘(𝑁‘𝑈)) = (𝑁‘𝑈))
5	1, 2, 4	syl2anc 579	1 ⊢ (𝜑 → (𝑁‘(𝑁‘𝑈)) = (𝑁‘𝑈))

Syntax hints:   → wi 4   = wceq 1656   ∈ wcel 2164   ⊆ wss 3798  ‘cfv 6127  Moorecmre 16602  mrClscmrc 16603

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1894  ax-4 1908  ax-5 2009  ax-6 2075  ax-7 2112  ax-8 2166  ax-9 2173  ax-10 2192  ax-11 2207  ax-12 2220  ax-13 2389  ax-ext 2803  ax-sep 5007  ax-nul 5015  ax-pow 5067  ax-pr 5129  ax-un 7214

This theorem depends on definitions:  df-bi 199  df-an 387  df-or 879  df-3an 1113  df-tru 1660  df-ex 1879  df-nf 1883  df-sb 2068  df-mo 2605  df-eu 2640  df-clab 2812  df-cleq 2818  df-clel 2821  df-nfc 2958  df-ne 3000  df-ral 3122  df-rex 3123  df-rab 3126  df-v 3416  df-sbc 3663  df-csb 3758  df-dif 3801  df-un 3803  df-in 3805  df-ss 3812  df-nul 4147  df-if 4309  df-pw 4382  df-sn 4400  df-pr 4402  df-op 4406  df-uni 4661  df-int 4700  df-br 4876  df-opab 4938  df-mpt 4955  df-id 5252  df-xp 5352  df-rel 5353  df-cnv 5354  df-co 5355  df-dm 5356  df-rn 5357  df-res 5358  df-ima 5359  df-iota 6090  df-fun 6129  df-fn 6130  df-f 6131  df-fv 6135  df-mre 16606  df-mrc 16607

This theorem is referenced by:  mressmrcd  16647  mreexexlem2d  16665  acsmap2d  17539