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Theorem idmot 26325
Description: The identity is a motion. (Contributed by Thierry Arnoux, 15-Dec-2019.)
Hypotheses
Ref Expression
ismot.p 𝑃 = (Base‘𝐺)
ismot.m = (dist‘𝐺)
motgrp.1 (𝜑𝐺𝑉)
Assertion
Ref Expression
idmot (𝜑 → ( I ↾ 𝑃) ∈ (𝐺Ismt𝐺))

Proof of Theorem idmot
Dummy variables 𝑎 𝑏 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 motgrp.1 . 2 (𝜑𝐺𝑉)
2 f1oi 6654 . . 3 ( I ↾ 𝑃):𝑃1-1-onto𝑃
32a1i 11 . 2 (𝜑 → ( I ↾ 𝑃):𝑃1-1-onto𝑃)
4 fvresi 6937 . . . . 5 (𝑎𝑃 → (( I ↾ 𝑃)‘𝑎) = 𝑎)
54ad2antrl 726 . . . 4 ((𝜑 ∧ (𝑎𝑃𝑏𝑃)) → (( I ↾ 𝑃)‘𝑎) = 𝑎)
6 fvresi 6937 . . . . 5 (𝑏𝑃 → (( I ↾ 𝑃)‘𝑏) = 𝑏)
76ad2antll 727 . . . 4 ((𝜑 ∧ (𝑎𝑃𝑏𝑃)) → (( I ↾ 𝑃)‘𝑏) = 𝑏)
85, 7oveq12d 7176 . . 3 ((𝜑 ∧ (𝑎𝑃𝑏𝑃)) → ((( I ↾ 𝑃)‘𝑎) (( I ↾ 𝑃)‘𝑏)) = (𝑎 𝑏))
98ralrimivva 3193 . 2 (𝜑 → ∀𝑎𝑃𝑏𝑃 ((( I ↾ 𝑃)‘𝑎) (( I ↾ 𝑃)‘𝑏)) = (𝑎 𝑏))
10 ismot.p . . . 4 𝑃 = (Base‘𝐺)
11 ismot.m . . . 4 = (dist‘𝐺)
1210, 11ismot 26323 . . 3 (𝐺𝑉 → (( I ↾ 𝑃) ∈ (𝐺Ismt𝐺) ↔ (( I ↾ 𝑃):𝑃1-1-onto𝑃 ∧ ∀𝑎𝑃𝑏𝑃 ((( I ↾ 𝑃)‘𝑎) (( I ↾ 𝑃)‘𝑏)) = (𝑎 𝑏))))
1312biimpar 480 . 2 ((𝐺𝑉 ∧ (( I ↾ 𝑃):𝑃1-1-onto𝑃 ∧ ∀𝑎𝑃𝑏𝑃 ((( I ↾ 𝑃)‘𝑎) (( I ↾ 𝑃)‘𝑏)) = (𝑎 𝑏))) → ( I ↾ 𝑃) ∈ (𝐺Ismt𝐺))
141, 3, 9, 13syl12anc 834 1 (𝜑 → ( I ↾ 𝑃) ∈ (𝐺Ismt𝐺))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 398   = wceq 1537  wcel 2114  wral 3140   I cid 5461  cres 5559  1-1-ontowf1o 6356  cfv 6357  (class class class)co 7158  Basecbs 16485  distcds 16576  Ismtcismt 26320
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-rep 5192  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-ral 3145  df-rex 3146  df-reu 3147  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-op 4576  df-uni 4841  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-id 5462  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-ov 7161  df-oprab 7162  df-mpo 7163  df-map 8410  df-ismt 26321
This theorem is referenced by:  motgrp  26331
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