Theorem f1otrgds 28955

Description: Convenient lemma for f1otrg 28957. (Contributed by Thierry Arnoux, 19-Mar-2019.)

Hypotheses

Ref	Expression
f1otrkg.p	⊢ 𝑃 = (Base‘𝐺)
f1otrkg.d	⊢ 𝐷 = (dist‘𝐺)
f1otrkg.i	⊢ 𝐼 = (Itv‘𝐺)
f1otrkg.b	⊢ 𝐵 = (Base‘𝐻)
f1otrkg.e	⊢ 𝐸 = (dist‘𝐻)
f1otrkg.j	⊢ 𝐽 = (Itv‘𝐻)
f1otrkg.f	⊢ (𝜑 → 𝐹:𝐵–1-1-onto→𝑃)
f1otrkg.1	⊢ ((𝜑 ∧ (𝑒 ∈ 𝐵 ∧ 𝑓 ∈ 𝐵)) → (𝑒𝐸𝑓) = ((𝐹‘𝑒)𝐷(𝐹‘𝑓)))
f1otrkg.2	⊢ ((𝜑 ∧ (𝑒 ∈ 𝐵 ∧ 𝑓 ∈ 𝐵 ∧ 𝑔 ∈ 𝐵)) → (𝑔 ∈ (𝑒𝐽𝑓) ↔ (𝐹‘𝑔) ∈ ((𝐹‘𝑒)𝐼(𝐹‘𝑓))))
f1otrgitv.x	⊢ (𝜑 → 𝑋 ∈ 𝐵)
f1otrgitv.y	⊢ (𝜑 → 𝑌 ∈ 𝐵)

Assertion

Ref	Expression
f1otrgds	⊢ (𝜑 → (𝑋𝐸𝑌) = ((𝐹‘𝑋)𝐷(𝐹‘𝑌)))

Distinct variable groups:   𝑒,𝑓,𝑔,𝐵   𝐷,𝑒,𝑓   𝑒,𝐸,𝑓   𝑒,𝐹,𝑓,𝑔   𝑒,𝐼,𝑓,𝑔   𝑒,𝐽,𝑓,𝑔   𝑒,𝑋,𝑓,𝑔   𝜑,𝑒,𝑓,𝑔   𝑓,𝑌,𝑔

Allowed substitution hints:   𝐷(𝑔)   𝑃(𝑒,𝑓,𝑔)   𝐸(𝑔)   𝐺(𝑒,𝑓,𝑔)   𝐻(𝑒,𝑓,𝑔)   𝑌(𝑒)

Proof of Theorem f1otrgds

Step	Hyp	Ref	Expression
1		f1otrkg.1	. . 3 ⊢ ((𝜑 ∧ (𝑒 ∈ 𝐵 ∧ 𝑓 ∈ 𝐵)) → (𝑒𝐸𝑓) = ((𝐹‘𝑒)𝐷(𝐹‘𝑓)))
2	1	ralrimivva 3182	. 2 ⊢ (𝜑 → ∀𝑒 ∈ 𝐵 ∀𝑓 ∈ 𝐵 (𝑒𝐸𝑓) = ((𝐹‘𝑒)𝐷(𝐹‘𝑓)))
3		f1otrgitv.x	. . 3 ⊢ (𝜑 → 𝑋 ∈ 𝐵)
4		f1otrgitv.y	. . 3 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
5		oveq1 7363	. . . . 5 ⊢ (𝑒 = 𝑋 → (𝑒𝐸𝑓) = (𝑋𝐸𝑓))
6		fveq2 6827	. . . . . 6 ⊢ (𝑒 = 𝑋 → (𝐹‘𝑒) = (𝐹‘𝑋))
7	6	oveq1d 7371	. . . . 5 ⊢ (𝑒 = 𝑋 → ((𝐹‘𝑒)𝐷(𝐹‘𝑓)) = ((𝐹‘𝑋)𝐷(𝐹‘𝑓)))
8	5, 7	eqeq12d 2755	. . . 4 ⊢ (𝑒 = 𝑋 → ((𝑒𝐸𝑓) = ((𝐹‘𝑒)𝐷(𝐹‘𝑓)) ↔ (𝑋𝐸𝑓) = ((𝐹‘𝑋)𝐷(𝐹‘𝑓))))
9		oveq2 7364	. . . . 5 ⊢ (𝑓 = 𝑌 → (𝑋𝐸𝑓) = (𝑋𝐸𝑌))
10		fveq2 6827	. . . . . 6 ⊢ (𝑓 = 𝑌 → (𝐹‘𝑓) = (𝐹‘𝑌))
11	10	oveq2d 7372	. . . . 5 ⊢ (𝑓 = 𝑌 → ((𝐹‘𝑋)𝐷(𝐹‘𝑓)) = ((𝐹‘𝑋)𝐷(𝐹‘𝑌)))
12	9, 11	eqeq12d 2755	. . . 4 ⊢ (𝑓 = 𝑌 → ((𝑋𝐸𝑓) = ((𝐹‘𝑋)𝐷(𝐹‘𝑓)) ↔ (𝑋𝐸𝑌) = ((𝐹‘𝑋)𝐷(𝐹‘𝑌))))
13	8, 12	rspc2v 3571	. . 3 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (∀𝑒 ∈ 𝐵 ∀𝑓 ∈ 𝐵 (𝑒𝐸𝑓) = ((𝐹‘𝑒)𝐷(𝐹‘𝑓)) → (𝑋𝐸𝑌) = ((𝐹‘𝑋)𝐷(𝐹‘𝑌))))
14	3, 4, 13	syl2anc 590	. 2 ⊢ (𝜑 → (∀𝑒 ∈ 𝐵 ∀𝑓 ∈ 𝐵 (𝑒𝐸𝑓) = ((𝐹‘𝑒)𝐷(𝐹‘𝑓)) → (𝑋𝐸𝑌) = ((𝐹‘𝑋)𝐷(𝐹‘𝑌))))
15	2, 14	mpd 15	1 ⊢ (𝜑 → (𝑋𝐸𝑌) = ((𝐹‘𝑋)𝐷(𝐹‘𝑌)))

Syntax hints:   → wi 4   ↔ wb 207   ∧ wa 396   ∧ w3a 1092   = wceq 1547   ∈ wcel 2119  ∀wral 3053  –1-1-onto→wf1o 6484  ‘cfv 6485  (class class class)co 7356  Basecbs 17170  distcds 17220  Itvcitv 28519

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-ext 2711

This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-sb 2074  df-clab 2718  df-cleq 2731  df-clel 2814  df-ral 3054  df-rab 3392  df-v 3433  df-dif 3886  df-un 3888  df-ss 3900  df-nul 4262  df-if 4455  df-sn 4556  df-pr 4558  df-op 4562  df-uni 4839  df-br 5073  df-iota 6441  df-fv 6493  df-ov 7359

This theorem is referenced by:  f1otrg  28957