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Theorem coexd 7944
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
StepHypRef Expression
1 coexd.1 . 2 (𝜑 → 𝐴 ∈ 𝑉)
2 coexd.2 . 2 (𝜑 → 𝐵 ∈ 𝑊)
3 coexg 7942 . 2 ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ∘ 𝐵) ∈ V)
41, 2, 3syl2anc 596 1 (𝜑 → (𝐴 ∘ 𝐵) ∈ V)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2144  Vcvv 3450   ∘ ccom 5654
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-ext 2732  ax-sep 5248  ax-pow 5326  ax-pr 5390  ax-un 7752
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-sb 2099  df-clab 2739  df-cleq 2752  df-clel 2835  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661
This theorem is used by:  wemapwe  9702  rhmmpl  22704  rhmply1vr1  22708  rhmply1vsca  22709  1arithidom  34116  esplyfval  34242  aks5lem2  43331  rhmpsr  43705  fuco112  50545  fuco111  50546  fuco112x  50548  prcof21a  50620
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