Theorem fcod 6532

Description: Composition of two mappings. (Contributed by Glauco Siliprandi, 26-Jun-2021.)

Hypotheses

Ref	Expression
fcod.1	⊢ (𝜑 → 𝐹:𝐵⟶𝐶)
fcod.2	⊢ (𝜑 → 𝐺:𝐴⟶𝐵)

Assertion

Ref	Expression
fcod	⊢ (𝜑 → (𝐹 ∘ 𝐺):𝐴⟶𝐶)

Proof of Theorem fcod

Step	Hyp	Ref	Expression
1		fcod.1	. 2 ⊢ (𝜑 → 𝐹:𝐵⟶𝐶)
2		fcod.2	. 2 ⊢ (𝜑 → 𝐺:𝐴⟶𝐵)
3		fco 6531	. 2 ⊢ ((𝐹:𝐵⟶𝐶 ∧ 𝐺:𝐴⟶𝐵) → (𝐹 ∘ 𝐺):𝐴⟶𝐶)
4	1, 2, 3	syl2anc 586	1 ⊢ (𝜑 → (𝐹 ∘ 𝐺):𝐴⟶𝐶)

Syntax hints:   → wi 4   ∘ ccom 5559  ⟶wf 6351

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2793  ax-sep 5203  ax-nul 5210  ax-pr 5330

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-sn 4568  df-pr 4570  df-op 4574  df-br 5067  df-opab 5129  df-id 5460  df-xp 5561  df-rel 5562  df-cnv 5563  df-co 5564  df-dm 5565  df-rn 5566  df-fun 6357  df-fn 6358  df-f 6359

This theorem is referenced by:  selvval2lem4  39156