Theorem brcofffn 43237

Description: Conditions allowing the decomposition of a binary relation. (Contributed by RP, 8-Jun-2021.)

Hypotheses

Ref	Expression
brcofffn.c	⊢ (𝜑 → 𝐶 Fn 𝑍)
brcofffn.d	⊢ (𝜑 → 𝐷:𝑌⟶𝑍)
brcofffn.e	⊢ (𝜑 → 𝐸:𝑋⟶𝑌)
brcofffn.r	⊢ (𝜑 → 𝐴(𝐶 ∘ (𝐷 ∘ 𝐸))𝐵)

Assertion

Ref	Expression
brcofffn	⊢ (𝜑 → (𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)) ∧ (𝐷‘(𝐸‘𝐴))𝐶𝐵))

Proof of Theorem brcofffn

Step	Hyp	Ref	Expression
1		brcofffn.c	. . . . 5 ⊢ (𝜑 → 𝐶 Fn 𝑍)
2		brcofffn.d	. . . . 5 ⊢ (𝜑 → 𝐷:𝑌⟶𝑍)
3		fnfco 6746	. . . . 5 ⊢ ((𝐶 Fn 𝑍 ∧ 𝐷:𝑌⟶𝑍) → (𝐶 ∘ 𝐷) Fn 𝑌)
4	1, 2, 3	syl2anc 583	. . . 4 ⊢ (𝜑 → (𝐶 ∘ 𝐷) Fn 𝑌)
5		brcofffn.e	. . . 4 ⊢ (𝜑 → 𝐸:𝑋⟶𝑌)
6		brcofffn.r	. . . . 5 ⊢ (𝜑 → 𝐴(𝐶 ∘ (𝐷 ∘ 𝐸))𝐵)
7		coass 6254	. . . . . 6 ⊢ ((𝐶 ∘ 𝐷) ∘ 𝐸) = (𝐶 ∘ (𝐷 ∘ 𝐸))
8	7	breqi 5144	. . . . 5 ⊢ (𝐴((𝐶 ∘ 𝐷) ∘ 𝐸)𝐵 ↔ 𝐴(𝐶 ∘ (𝐷 ∘ 𝐸))𝐵)
9	6, 8	sylibr 233	. . . 4 ⊢ (𝜑 → 𝐴((𝐶 ∘ 𝐷) ∘ 𝐸)𝐵)
10	4, 5, 9	brcoffn 43236	. . 3 ⊢ (𝜑 → (𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵))
11	1	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵)) → 𝐶 Fn 𝑍)
12	2	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵)) → 𝐷:𝑌⟶𝑍)
13		simprr 770	. . . . 5 ⊢ ((𝜑 ∧ (𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵)) → (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵)
14	11, 12, 13	brcoffn 43236	. . . 4 ⊢ ((𝜑 ∧ (𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵)) → ((𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)) ∧ (𝐷‘(𝐸‘𝐴))𝐶𝐵))
15	14	ex 412	. . 3 ⊢ (𝜑 → ((𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵) → ((𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)) ∧ (𝐷‘(𝐸‘𝐴))𝐶𝐵)))
16	10, 15	jcai 516	. 2 ⊢ (𝜑 → ((𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵) ∧ ((𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)) ∧ (𝐷‘(𝐸‘𝐴))𝐶𝐵)))
17		simpll 764	. . 3 ⊢ (((𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵) ∧ ((𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)) ∧ (𝐷‘(𝐸‘𝐴))𝐶𝐵)) → 𝐴𝐸(𝐸‘𝐴))
18		simprl 768	. . 3 ⊢ (((𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵) ∧ ((𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)) ∧ (𝐷‘(𝐸‘𝐴))𝐶𝐵)) → (𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)))
19		simprr 770	. . 3 ⊢ (((𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵) ∧ ((𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)) ∧ (𝐷‘(𝐸‘𝐴))𝐶𝐵)) → (𝐷‘(𝐸‘𝐴))𝐶𝐵)
20	17, 18, 19	3jca 1125	. 2 ⊢ (((𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)(𝐶 ∘ 𝐷)𝐵) ∧ ((𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)) ∧ (𝐷‘(𝐸‘𝐴))𝐶𝐵)) → (𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)) ∧ (𝐷‘(𝐸‘𝐴))𝐶𝐵))
21	16, 20	syl 17	1 ⊢ (𝜑 → (𝐴𝐸(𝐸‘𝐴) ∧ (𝐸‘𝐴)𝐷(𝐷‘(𝐸‘𝐴)) ∧ (𝐷‘(𝐸‘𝐴))𝐶𝐵))

Syntax hints:   → wi 4   ∧ wa 395   ∧ w3a 1084   class class class wbr 5138   ∘ ccom 5670   Fn wfn 6528  ⟶wf 6529  ‘cfv 6533

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1905  ax-6 1963  ax-7 2003  ax-8 2100  ax-9 2108  ax-10 2129  ax-11 2146  ax-12 2163  ax-ext 2695  ax-sep 5289  ax-nul 5296  ax-pr 5417

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 845  df-3an 1086  df-tru 1536  df-fal 1546  df-ex 1774  df-nf 1778  df-sb 2060  df-mo 2526  df-eu 2555  df-clab 2702  df-cleq 2716  df-clel 2802  df-nfc 2877  df-ne 2933  df-ral 3054  df-rex 3063  df-rab 3425  df-v 3468  df-dif 3943  df-un 3945  df-in 3947  df-ss 3957  df-nul 4315  df-if 4521  df-sn 4621  df-pr 4623  df-op 4627  df-uni 4900  df-br 5139  df-opab 5201  df-id 5564  df-xp 5672  df-rel 5673  df-cnv 5674  df-co 5675  df-dm 5676  df-rn 5677  df-res 5678  df-ima 5679  df-iota 6485  df-fun 6535  df-fn 6536  df-f 6537  df-fv 6541

This theorem is referenced by:  brco3f1o  43239  neicvgmex  43323  neicvgel1  43325