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Theorem mircinv 29145

Description: The center point is invariant of a point inversion. (Contributed by Thierry Arnoux, 25-Aug-2019.)

**Hypotheses**
Ref	Expression
mirval.p	⊢ 𝑃 = (Base‘𝐺)
mirval.d	⊢ − = (dist‘𝐺)
mirval.i	⊢ 𝐼 = (Itv‘𝐺)
mirval.l	⊢ 𝐿 = (LineG‘𝐺)
mirval.s	⊢ 𝑆 = (pInvG‘𝐺)
mirval.g	⊢ (𝜑 → 𝐺 ∈ TarskiG)
mirval.a	⊢ (𝜑 → 𝐴 ∈ 𝑃)
mirfv.m	⊢ 𝑀 = (𝑆‘𝐴)

**Assertion**
Ref	Expression
mircinv	⊢ (𝜑 → (𝑀‘𝐴) = 𝐴)

**Proof of Theorem mircinv**
Step	Hyp	Ref	Expression
1		eqid 2760	. 2 ⊢ 𝐴 = 𝐴
2		mirval.p	. . 3 ⊢ 𝑃 = (Base‘𝐺)
3		mirval.d	. . 3 ⊢ − = (dist‘𝐺)
4		mirval.i	. . 3 ⊢ 𝐼 = (Itv‘𝐺)
5		mirval.l	. . 3 ⊢ 𝐿 = (LineG‘𝐺)
6		mirval.s	. . 3 ⊢ 𝑆 = (pInvG‘𝐺)
7		mirval.g	. . 3 ⊢ (𝜑 → 𝐺 ∈ TarskiG)
8		mirval.a	. . 3 ⊢ (𝜑 → 𝐴 ∈ 𝑃)
9		mirfv.m	. . 3 ⊢ 𝑀 = (𝑆‘𝐴)
10	2, 3, 4, 5, 6, 7, 8, 9, 8	mirinv 29143	. 2 ⊢ (𝜑 → ((𝑀‘𝐴) = 𝐴 ↔ 𝐴 = 𝐴))
11	1, 10	mpbiri 261	1 ⊢ (𝜑 → (𝑀‘𝐴) = 𝐴)

Colors of variables: wff setvar class

This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 ‘cfv 6538 Basecbs 17392 distcds 17442 TarskiGcstrkg 28894 Itvcitv 28900 LineGclng 28901 pInvGcmir 29129

This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pr 5390

This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-trkgc 28915 df-trkgb 28916 df-trkgcb 28917 df-trkg 28920 df-mir 29130

This theorem is used by: mirln 29153 mirconn 29155 mirbtwnhl 29157 midexlem 29169 ragtrivb 29182 colperpexlem1 29211 colperpexlem3 29213 midex 29218 mirplncl 29278 lmieu 29294 prlngmid2 29444

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