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Theorem prcofdiag1 50019
Description: A constant functor pre-composed by a functor is another constant functor. (Contributed by Zhi Wang, 25-Nov-2025.)
Hypotheses
Ref Expression
prcofdiag.l 𝐿 = (𝐶Δfunc𝐷)
prcofdiag.m 𝑀 = (𝐶Δfunc𝐸)
prcofdiag.f (𝜑𝐹 ∈ (𝐸 Func 𝐷))
prcofdiag.c (𝜑𝐶 ∈ Cat)
prcofdiag1.b 𝐵 = (Base‘𝐶)
prcofdiag1.x (𝜑𝑋𝐵)
Assertion
Ref Expression
prcofdiag1 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) = ((1st𝑀)‘𝑋))

Proof of Theorem prcofdiag1
Dummy variables 𝑓 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2764 . . . . . 6 (Base‘𝐸) = (Base‘𝐸)
2 prcofdiag1.b . . . . . 6 𝐵 = (Base‘𝐶)
3 prcofdiag.f . . . . . . . 8 (𝜑𝐹 ∈ (𝐸 Func 𝐷))
4 prcofdiag.l . . . . . . . . 9 𝐿 = (𝐶Δfunc𝐷)
5 prcofdiag.c . . . . . . . . 9 (𝜑𝐶 ∈ Cat)
63func1st2nd 49702 . . . . . . . . . 10 (𝜑 → (1st𝐹)(𝐸 Func 𝐷)(2nd𝐹))
76funcrcl3 49706 . . . . . . . . 9 (𝜑𝐷 ∈ Cat)
8 prcofdiag1.x . . . . . . . . 9 (𝜑𝑋𝐵)
9 eqid 2764 . . . . . . . . 9 ((1st𝐿)‘𝑋) = ((1st𝐿)‘𝑋)
104, 5, 7, 2, 8, 9diag1cl 18276 . . . . . . . 8 (𝜑 → ((1st𝐿)‘𝑋) ∈ (𝐷 Func 𝐶))
113, 10cofucl 17923 . . . . . . 7 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) ∈ (𝐸 Func 𝐶))
1211func1st2nd 49702 . . . . . 6 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))(𝐸 Func 𝐶)(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)))
131, 2, 12funcf1 17901 . . . . 5 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)):(Base‘𝐸)⟶𝐵)
1413ffnd 6694 . . . 4 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) Fn (Base‘𝐸))
15 prcofdiag.m . . . . . . . 8 𝑀 = (𝐶Δfunc𝐸)
166funcrcl2 49705 . . . . . . . 8 (𝜑𝐸 ∈ Cat)
17 eqid 2764 . . . . . . . 8 ((1st𝑀)‘𝑋) = ((1st𝑀)‘𝑋)
1815, 5, 16, 2, 8, 17diag1cl 18276 . . . . . . 7 (𝜑 → ((1st𝑀)‘𝑋) ∈ (𝐸 Func 𝐶))
1918func1st2nd 49702 . . . . . 6 (𝜑 → (1st ‘((1st𝑀)‘𝑋))(𝐸 Func 𝐶)(2nd ‘((1st𝑀)‘𝑋)))
201, 2, 19funcf1 17901 . . . . 5 (𝜑 → (1st ‘((1st𝑀)‘𝑋)):(Base‘𝐸)⟶𝐵)
2120ffnd 6694 . . . 4 (𝜑 → (1st ‘((1st𝑀)‘𝑋)) Fn (Base‘𝐸))
225adantr 484 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝐶 ∈ Cat)
237adantr 484 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝐷 ∈ Cat)
248adantr 484 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝑋𝐵)
25 eqid 2764 . . . . . 6 (Base‘𝐷) = (Base‘𝐷)
261, 25, 6funcf1 17901 . . . . . . 7 (𝜑 → (1st𝐹):(Base‘𝐸)⟶(Base‘𝐷))
2726ffvelcdmda 7067 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st𝐹)‘𝑥) ∈ (Base‘𝐷))
284, 22, 23, 2, 24, 9, 25, 27diag11 18277 . . . . 5 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘((1st𝐿)‘𝑋))‘((1st𝐹)‘𝑥)) = 𝑋)
293adantr 484 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝐹 ∈ (𝐸 Func 𝐷))
3010adantr 484 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st𝐿)‘𝑋) ∈ (𝐷 Func 𝐶))
31 simpr 488 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝑥 ∈ (Base‘𝐸))
321, 29, 30, 31cofu1 17919 . . . . 5 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))‘𝑥) = ((1st ‘((1st𝐿)‘𝑋))‘((1st𝐹)‘𝑥)))
3316adantr 484 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝐸 ∈ Cat)
3415, 22, 33, 2, 24, 17, 1, 31diag11 18277 . . . . 5 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘((1st𝑀)‘𝑋))‘𝑥) = 𝑋)
3528, 32, 343eqtr4d 2809 . . . 4 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))‘𝑥) = ((1st ‘((1st𝑀)‘𝑋))‘𝑥))
3614, 21, 35eqfnfvd 7016 . . 3 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) = (1st ‘((1st𝑀)‘𝑋)))
371, 12funcfn2 17904 . . . 4 (𝜑 → (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) Fn ((Base‘𝐸) × (Base‘𝐸)))
381, 19funcfn2 17904 . . . 4 (𝜑 → (2nd ‘((1st𝑀)‘𝑋)) Fn ((Base‘𝐸) × (Base‘𝐸)))
39 eqid 2764 . . . . . . 7 (Hom ‘𝐸) = (Hom ‘𝐸)
40 eqid 2764 . . . . . . 7 (Hom ‘𝐶) = (Hom ‘𝐶)
4112adantr 484 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))(𝐸 Func 𝐶)(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)))
42 simprl 780 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → 𝑥 ∈ (Base‘𝐸))
43 simprr 782 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → 𝑦 ∈ (Base‘𝐸))
441, 39, 40, 41, 42, 43funcf2 17903 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))𝑦):(𝑥(Hom ‘𝐸)𝑦)⟶(((1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))‘𝑥)(Hom ‘𝐶)((1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))‘𝑦)))
4544ffnd 6694 . . . . 5 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))𝑦) Fn (𝑥(Hom ‘𝐸)𝑦))
4619adantr 484 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (1st ‘((1st𝑀)‘𝑋))(𝐸 Func 𝐶)(2nd ‘((1st𝑀)‘𝑋)))
471, 39, 40, 46, 42, 43funcf2 17903 . . . . . 6 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘((1st𝑀)‘𝑋))𝑦):(𝑥(Hom ‘𝐸)𝑦)⟶(((1st ‘((1st𝑀)‘𝑋))‘𝑥)(Hom ‘𝐶)((1st ‘((1st𝑀)‘𝑋))‘𝑦)))
4847ffnd 6694 . . . . 5 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘((1st𝑀)‘𝑋))𝑦) Fn (𝑥(Hom ‘𝐸)𝑦))
495ad2antrr 736 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝐶 ∈ Cat)
507ad2antrr 736 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝐷 ∈ Cat)
518ad2antrr 736 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝑋𝐵)
526ad2antrr 736 . . . . . . . . 9 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → (1st𝐹)(𝐸 Func 𝐷)(2nd𝐹))
531, 25, 52funcf1 17901 . . . . . . . 8 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → (1st𝐹):(Base‘𝐸)⟶(Base‘𝐷))
5442adantr 484 . . . . . . . 8 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝑥 ∈ (Base‘𝐸))
5553, 54ffvelcdmd 7068 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((1st𝐹)‘𝑥) ∈ (Base‘𝐷))
56 eqid 2764 . . . . . . 7 (Hom ‘𝐷) = (Hom ‘𝐷)
57 eqid 2764 . . . . . . 7 (Id‘𝐶) = (Id‘𝐶)
5843adantr 484 . . . . . . . 8 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝑦 ∈ (Base‘𝐸))
5953, 58ffvelcdmd 7068 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((1st𝐹)‘𝑦) ∈ (Base‘𝐷))
601, 39, 56, 52, 54, 58funcf2 17903 . . . . . . . 8 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → (𝑥(2nd𝐹)𝑦):(𝑥(Hom ‘𝐸)𝑦)⟶(((1st𝐹)‘𝑥)(Hom ‘𝐷)((1st𝐹)‘𝑦)))
61 simpr 488 . . . . . . . 8 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦))
6260, 61ffvelcdmd 7068 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((𝑥(2nd𝐹)𝑦)‘𝑓) ∈ (((1st𝐹)‘𝑥)(Hom ‘𝐷)((1st𝐹)‘𝑦)))
634, 49, 50, 2, 51, 9, 25, 55, 56, 57, 59, 62diag12 18278 . . . . . 6 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((((1st𝐹)‘𝑥)(2nd ‘((1st𝐿)‘𝑋))((1st𝐹)‘𝑦))‘((𝑥(2nd𝐹)𝑦)‘𝑓)) = ((Id‘𝐶)‘𝑋))
643ad2antrr 736 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝐹 ∈ (𝐸 Func 𝐷))
6510ad2antrr 736 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((1st𝐿)‘𝑋) ∈ (𝐷 Func 𝐶))
661, 64, 65, 54, 58, 39, 61cofu2 17921 . . . . . 6 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((𝑥(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))𝑦)‘𝑓) = ((((1st𝐹)‘𝑥)(2nd ‘((1st𝐿)‘𝑋))((1st𝐹)‘𝑦))‘((𝑥(2nd𝐹)𝑦)‘𝑓)))
6716ad2antrr 736 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝐸 ∈ Cat)
6815, 49, 67, 2, 51, 17, 1, 54, 39, 57, 58, 61diag12 18278 . . . . . 6 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((𝑥(2nd ‘((1st𝑀)‘𝑋))𝑦)‘𝑓) = ((Id‘𝐶)‘𝑋))
6963, 66, 683eqtr4d 2809 . . . . 5 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((𝑥(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))𝑦)‘𝑓) = ((𝑥(2nd ‘((1st𝑀)‘𝑋))𝑦)‘𝑓))
7045, 48, 69eqfnfvd 7016 . . . 4 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))𝑦) = (𝑥(2nd ‘((1st𝑀)‘𝑋))𝑦))
7137, 38, 70eqfnovd 49492 . . 3 (𝜑 → (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) = (2nd ‘((1st𝑀)‘𝑋)))
7236, 71opeq12d 4841 . 2 (𝜑 → ⟨(1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)), (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))⟩ = ⟨(1st ‘((1st𝑀)‘𝑋)), (2nd ‘((1st𝑀)‘𝑋))⟩)
73 relfunc 17897 . . 3 Rel (𝐸 Func 𝐶)
74 1st2nd 8022 . . 3 ((Rel (𝐸 Func 𝐶) ∧ (((1st𝐿)‘𝑋) ∘func 𝐹) ∈ (𝐸 Func 𝐶)) → (((1st𝐿)‘𝑋) ∘func 𝐹) = ⟨(1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)), (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))⟩)
7573, 11, 74sylancr 596 . 2 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) = ⟨(1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)), (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))⟩)
76 1st2nd 8022 . . 3 ((Rel (𝐸 Func 𝐶) ∧ ((1st𝑀)‘𝑋) ∈ (𝐸 Func 𝐶)) → ((1st𝑀)‘𝑋) = ⟨(1st ‘((1st𝑀)‘𝑋)), (2nd ‘((1st𝑀)‘𝑋))⟩)
7773, 18, 76sylancr 596 . 2 (𝜑 → ((1st𝑀)‘𝑋) = ⟨(1st ‘((1st𝑀)‘𝑋)), (2nd ‘((1st𝑀)‘𝑋))⟩)
7872, 75, 773eqtr4d 2809 1 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) = ((1st𝑀)‘𝑋))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 399   = wceq 1562  wcel 2144  cop 4590   class class class wbr 5102  Rel wrel 5654  cfv 6523  (class class class)co 7398  1st c1st 7970  2nd c2nd 7971  Basecbs 17247  Hom chom 17299  Catccat 17698  Idccid 17699   Func cfunc 17889  func ccofu 17891  Δfunccdiag 18246
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1817  ax-4 1831  ax-5 1932  ax-6 1989  ax-7 2030  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2214  ax-ext 2736  ax-rep 5229  ax-sep 5248  ax-nul 5258  ax-pow 5324  ax-pr 5392  ax-un 7720  ax-cnex 11131  ax-resscn 11132  ax-1cn 11133  ax-icn 11134  ax-addcl 11135  ax-addrcl 11136  ax-mulcl 11137  ax-mulrcl 11138  ax-mulcom 11139  ax-addass 11140  ax-mulass 11141  ax-distr 11142  ax-i2m1 11143  ax-1ne0 11144  ax-1rid 11145  ax-rnegex 11146  ax-rrecex 11147  ax-cnre 11148  ax-pre-lttri 11149  ax-pre-lttrn 11150  ax-pre-ltadd 11151  ax-pre-mulgt0 11152
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3or 1100  df-3an 1101  df-tru 1565  df-fal 1575  df-ex 1802  df-nf 1806  df-sb 2093  df-mo 2568  df-eu 2598  df-clab 2743  df-cleq 2756  df-clel 2839  df-nfc 2913  df-ne 2960  df-nel 3064  df-ral 3079  df-rex 3089  df-rmo 3369  df-reu 3370  df-rab 3417  df-v 3458  df-sbc 3747  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-pss 3926  df-nul 4288  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-tp 4589  df-op 4591  df-uni 4868  df-iun 4953  df-br 5103  df-opab 5165  df-mpt 5184  df-tr 5210  df-id 5544  df-eprel 5549  df-po 5557  df-so 5558  df-fr 5602  df-we 5604  df-xp 5655  df-rel 5656  df-cnv 5657  df-co 5658  df-dm 5659  df-rn 5660  df-res 5661  df-ima 5662  df-pred 6290  df-ord 6351  df-on 6352  df-lim 6353  df-suc 6354  df-iota 6479  df-fun 6525  df-fn 6526  df-f 6527  df-f1 6528  df-fo 6529  df-f1o 6530  df-fv 6531  df-riota 7355  df-ov 7401  df-oprab 7402  df-mpo 7403  df-om 7849  df-1st 7972  df-2nd 7973  df-frecs 8264  df-wrecs 8295  df-recs 8344  df-rdg 8383  df-1o 8439  df-er 8680  df-map 8812  df-ixp 8882  df-en 8930  df-dom 8931  df-sdom 8932  df-fin 8933  df-pnf 11220  df-mnf 11221  df-xr 11222  df-ltxr 11223  df-le 11224  df-sub 11418  df-neg 11419  df-nn 12213  df-2 12282  df-3 12283  df-4 12284  df-5 12285  df-6 12286  df-7 12287  df-8 12288  df-9 12289  df-n0 12484  df-z 12571  df-dec 12691  df-uz 12842  df-fz 13515  df-struct 17185  df-slot 17220  df-ndx 17232  df-base 17248  df-hom 17312  df-cco 17313  df-cat 17702  df-cid 17703  df-func 17893  df-cofu 17895  df-nat 17981  df-fuc 17982  df-xpc 18206  df-1stf 18207  df-curf 18248  df-diag 18250
This theorem is referenced by:  prcofdiag  50020
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