Theorem ringchomALTV

Description: Set of arrows of the category of rings (in a universe). (Contributed by AV, 14-Feb-2020) (New usage is discouraged.)

	Ref	Expression
Hypotheses	ringcbasALTV.c	⊢ 𝐶 = ( RingCatALTV ‘ 𝑈 )
	ringcbasALTV.b	⊢ 𝐵 = ( Base ‘ 𝐶 )
	ringcbasALTV.u	⊢ ( 𝜑 → 𝑈 ∈ 𝑉 )
	ringchomfvalALTV.h	⊢ 𝐻 = ( Hom ‘ 𝐶 )
	ringchomALTV.x	⊢ ( 𝜑 → 𝑋 ∈ 𝐵 )
	ringchomALTV.y	⊢ ( 𝜑 → 𝑌 ∈ 𝐵 )
Assertion	ringchomALTV	⊢ ( 𝜑 → ( 𝑋 𝐻 𝑌 ) = ( 𝑋 RingHom 𝑌 ) )

Proof

Step	Hyp	Ref	Expression
1		ringcbasALTV.c	⊢ 𝐶 = ( RingCatALTV ‘ 𝑈 )
2		ringcbasALTV.b	⊢ 𝐵 = ( Base ‘ 𝐶 )
3		ringcbasALTV.u	⊢ ( 𝜑 → 𝑈 ∈ 𝑉 )
4		ringchomfvalALTV.h	⊢ 𝐻 = ( Hom ‘ 𝐶 )
5		ringchomALTV.x	⊢ ( 𝜑 → 𝑋 ∈ 𝐵 )
6		ringchomALTV.y	⊢ ( 𝜑 → 𝑌 ∈ 𝐵 )
7	1 2 3 4	ringchomfvalALTV	⊢ ( 𝜑 → 𝐻 = ( 𝑥 ∈ 𝐵 , 𝑦 ∈ 𝐵 ↦ ( 𝑥 RingHom 𝑦 ) ) )
8		oveq12	⊢ ( ( 𝑥 = 𝑋 ∧ 𝑦 = 𝑌 ) → ( 𝑥 RingHom 𝑦 ) = ( 𝑋 RingHom 𝑌 ) )
9	8	adantl	⊢ ( ( 𝜑 ∧ ( 𝑥 = 𝑋 ∧ 𝑦 = 𝑌 ) ) → ( 𝑥 RingHom 𝑦 ) = ( 𝑋 RingHom 𝑌 ) )
10		ovexd	⊢ ( 𝜑 → ( 𝑋 RingHom 𝑌 ) ∈ V )
11	7 9 5 6 10	ovmpod	⊢ ( 𝜑 → ( 𝑋 𝐻 𝑌 ) = ( 𝑋 RingHom 𝑌 ) )