Theorem coexd 7871

Description: The composition of two sets is a set. (Contributed by SN, 7-Feb-2025.)

Hypotheses

Ref	Expression
coexd.1	⊢ (𝜑 → 𝐴 ∈ 𝑉)
coexd.2	⊢ (𝜑 → 𝐵 ∈ 𝑊)

Assertion

Ref	Expression
coexd	⊢ (𝜑 → (𝐴 ∘ 𝐵) ∈ V)

Proof of Theorem coexd

Step	Hyp	Ref	Expression
1		coexd.1	. 2 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
2		coexd.2	. 2 ⊢ (𝜑 → 𝐵 ∈ 𝑊)
3		coexg 7869	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∘ 𝐵) ∈ V)
4	1, 2, 3	syl2anc 590	1 ⊢ (𝜑 → (𝐴 ∘ 𝐵) ∈ V)

Syntax hints:   → wi 4   ∈ wcel 2119  Vcvv 3431   ∘ ccom 5622

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  ax-sep 5218  ax-pow 5294  ax-pr 5362  ax-un 7678

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-rex 3064  df-rab 3392  df-v 3433  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4262  df-if 4455  df-pw 4531  df-sn 4556  df-pr 4558  df-op 4562  df-uni 4839  df-br 5073  df-opab 5135  df-xp 5624  df-rel 5625  df-cnv 5626  df-co 5627  df-dm 5628  df-rn 5629

This theorem is referenced by:  rhmmpl  22366  rhmply1vr1  22370  rhmply1vsca  22371  1arithidom  33620  esplyfval  33747  aks5lem2  42672  rhmpsr  43033  fuco112  49819  fuco111  49820  fuco112x  49822  prcof21a  49881