Theorem opf2fval 50063

Description: The morphism part of the op functor on functor categories. Lemma for fucoppc 50068. (Contributed by Zhi Wang, 18-Nov-2025.)

Hypotheses

Ref	Expression
opf2fval.f	⊢ (𝜑 → 𝐹 = (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑦𝑁𝑥))))
opf2fval.x	⊢ (𝜑 → 𝑋 ∈ 𝐴)
opf2fval.y	⊢ (𝜑 → 𝑌 ∈ 𝐵)

Assertion

Ref	Expression
opf2fval	⊢ (𝜑 → (𝑋𝐹𝑌) = ( I ↾ (𝑌𝑁𝑋)))

Distinct variable groups:   𝑥,𝑁,𝑦   𝑥,𝑋,𝑦   𝑥,𝑌,𝑦   𝜑,𝑥,𝑦

Allowed substitution hints:   𝐴(𝑥,𝑦)   𝐵(𝑥,𝑦)   𝐹(𝑥,𝑦)

Proof of Theorem opf2fval

Step	Hyp	Ref	Expression
1		opf2fval.f	. 2 ⊢ (𝜑 → 𝐹 = (𝑥 ∈ 𝐴, 𝑦 ∈ 𝐵 ↦ ( I ↾ (𝑦𝑁𝑥))))
2		simprr 784	. . . 4 ⊢ ((𝜑 ∧ (𝑥 = 𝑋 ∧ 𝑦 = 𝑌)) → 𝑦 = 𝑌)
3		simprl 782	. . . 4 ⊢ ((𝜑 ∧ (𝑥 = 𝑋 ∧ 𝑦 = 𝑌)) → 𝑥 = 𝑋)
4	2, 3	oveq12d 7426	. . 3 ⊢ ((𝜑 ∧ (𝑥 = 𝑋 ∧ 𝑦 = 𝑌)) → (𝑦𝑁𝑥) = (𝑌𝑁𝑋))
5	4	reseq2d 5976	. 2 ⊢ ((𝜑 ∧ (𝑥 = 𝑋 ∧ 𝑦 = 𝑌)) → ( I ↾ (𝑦𝑁𝑥)) = ( I ↾ (𝑌𝑁𝑋)))
6		opf2fval.x	. 2 ⊢ (𝜑 → 𝑋 ∈ 𝐴)
7		opf2fval.y	. 2 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
8		ovexd 7443	. . 3 ⊢ (𝜑 → (𝑌𝑁𝑋) ∈ V)
9		resiexg 7905	. . 3 ⊢ ((𝑌𝑁𝑋) ∈ V → ( I ↾ (𝑌𝑁𝑋)) ∈ V)
10	8, 9	syl 18	. 2 ⊢ (𝜑 → ( I ↾ (𝑌𝑁𝑋)) ∈ V)
11	1, 5, 6, 7, 10	ovmpod 7560	1 ⊢ (𝜑 → (𝑋𝐹𝑌) = ( I ↾ (𝑌𝑁𝑋)))

Syntax hints:   → wi 4   ∧ wa 400   = wceq 1567   ∈ wcel 2149  Vcvv 3463   I cid 5553   ↾ cres 5661  (class class class)co 7408   ∈ cmpo 7410

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-sep 5258  ax-nul 5268  ax-pow 5334  ax-pr 5402  ax-un 7730

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-rab 3424  df-v 3465  df-sbc 3754  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4490  df-pw 4566  df-sn 4592  df-pr 4594  df-op 4598  df-uni 4874  df-br 5111  df-opab 5175  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-res 5671  df-iota 6490  df-fun 6536  df-fv 6542  df-ov 7411  df-oprab 7412  df-mpo 7413

This theorem is referenced by:  opf2  50064  fucoppc  50068