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Theorem prcofdiag1 49884
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 2737 . . . . . 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 49567 . . . . . . . . . 10 (𝜑 → (1st𝐹)(𝐸 Func 𝐷)(2nd𝐹))
76funcrcl3 49571 . . . . . . . . 9 (𝜑𝐷 ∈ Cat)
8 prcofdiag1.x . . . . . . . . 9 (𝜑𝑋𝐵)
9 eqid 2737 . . . . . . . . 9 ((1st𝐿)‘𝑋) = ((1st𝐿)‘𝑋)
104, 5, 7, 2, 8, 9diag1cl 18203 . . . . . . . 8 (𝜑 → ((1st𝐿)‘𝑋) ∈ (𝐷 Func 𝐶))
113, 10cofucl 17850 . . . . . . 7 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) ∈ (𝐸 Func 𝐶))
1211func1st2nd 49567 . . . . . 6 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))(𝐸 Func 𝐶)(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)))
131, 2, 12funcf1 17828 . . . . 5 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)):(Base‘𝐸)⟶𝐵)
1413ffnd 6665 . . . 4 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) Fn (Base‘𝐸))
15 prcofdiag.m . . . . . . . 8 𝑀 = (𝐶Δfunc𝐸)
166funcrcl2 49570 . . . . . . . 8 (𝜑𝐸 ∈ Cat)
17 eqid 2737 . . . . . . . 8 ((1st𝑀)‘𝑋) = ((1st𝑀)‘𝑋)
1815, 5, 16, 2, 8, 17diag1cl 18203 . . . . . . 7 (𝜑 → ((1st𝑀)‘𝑋) ∈ (𝐸 Func 𝐶))
1918func1st2nd 49567 . . . . . 6 (𝜑 → (1st ‘((1st𝑀)‘𝑋))(𝐸 Func 𝐶)(2nd ‘((1st𝑀)‘𝑋)))
201, 2, 19funcf1 17828 . . . . 5 (𝜑 → (1st ‘((1st𝑀)‘𝑋)):(Base‘𝐸)⟶𝐵)
2120ffnd 6665 . . . 4 (𝜑 → (1st ‘((1st𝑀)‘𝑋)) Fn (Base‘𝐸))
225adantr 480 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝐶 ∈ Cat)
237adantr 480 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝐷 ∈ Cat)
248adantr 480 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝑋𝐵)
25 eqid 2737 . . . . . 6 (Base‘𝐷) = (Base‘𝐷)
261, 25, 6funcf1 17828 . . . . . . 7 (𝜑 → (1st𝐹):(Base‘𝐸)⟶(Base‘𝐷))
2726ffvelcdmda 7032 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st𝐹)‘𝑥) ∈ (Base‘𝐷))
284, 22, 23, 2, 24, 9, 25, 27diag11 18204 . . . . 5 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘((1st𝐿)‘𝑋))‘((1st𝐹)‘𝑥)) = 𝑋)
293adantr 480 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝐹 ∈ (𝐸 Func 𝐷))
3010adantr 480 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st𝐿)‘𝑋) ∈ (𝐷 Func 𝐶))
31 simpr 484 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝑥 ∈ (Base‘𝐸))
321, 29, 30, 31cofu1 17846 . . . . 5 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))‘𝑥) = ((1st ‘((1st𝐿)‘𝑋))‘((1st𝐹)‘𝑥)))
3316adantr 480 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → 𝐸 ∈ Cat)
3415, 22, 33, 2, 24, 17, 1, 31diag11 18204 . . . . 5 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘((1st𝑀)‘𝑋))‘𝑥) = 𝑋)
3528, 32, 343eqtr4d 2782 . . . 4 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))‘𝑥) = ((1st ‘((1st𝑀)‘𝑋))‘𝑥))
3614, 21, 35eqfnfvd 6982 . . 3 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) = (1st ‘((1st𝑀)‘𝑋)))
371, 12funcfn2 17831 . . . 4 (𝜑 → (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) Fn ((Base‘𝐸) × (Base‘𝐸)))
381, 19funcfn2 17831 . . . 4 (𝜑 → (2nd ‘((1st𝑀)‘𝑋)) Fn ((Base‘𝐸) × (Base‘𝐸)))
39 eqid 2737 . . . . . . 7 (Hom ‘𝐸) = (Hom ‘𝐸)
40 eqid 2737 . . . . . . 7 (Hom ‘𝐶) = (Hom ‘𝐶)
4112adantr 480 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))(𝐸 Func 𝐶)(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)))
42 simprl 771 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → 𝑥 ∈ (Base‘𝐸))
43 simprr 773 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → 𝑦 ∈ (Base‘𝐸))
441, 39, 40, 41, 42, 43funcf2 17830 . . . . . 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 6665 . . . . 5 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))𝑦) Fn (𝑥(Hom ‘𝐸)𝑦))
4619adantr 480 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (1st ‘((1st𝑀)‘𝑋))(𝐸 Func 𝐶)(2nd ‘((1st𝑀)‘𝑋)))
471, 39, 40, 46, 42, 43funcf2 17830 . . . . . 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 6665 . . . . 5 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘((1st𝑀)‘𝑋))𝑦) Fn (𝑥(Hom ‘𝐸)𝑦))
495ad2antrr 727 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝐶 ∈ Cat)
507ad2antrr 727 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝐷 ∈ Cat)
518ad2antrr 727 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝑋𝐵)
526ad2antrr 727 . . . . . . . . 9 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → (1st𝐹)(𝐸 Func 𝐷)(2nd𝐹))
531, 25, 52funcf1 17828 . . . . . . . 8 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → (1st𝐹):(Base‘𝐸)⟶(Base‘𝐷))
5442adantr 480 . . . . . . . 8 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝑥 ∈ (Base‘𝐸))
5553, 54ffvelcdmd 7033 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((1st𝐹)‘𝑥) ∈ (Base‘𝐷))
56 eqid 2737 . . . . . . 7 (Hom ‘𝐷) = (Hom ‘𝐷)
57 eqid 2737 . . . . . . 7 (Id‘𝐶) = (Id‘𝐶)
5843adantr 480 . . . . . . . 8 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝑦 ∈ (Base‘𝐸))
5953, 58ffvelcdmd 7033 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((1st𝐹)‘𝑦) ∈ (Base‘𝐷))
601, 39, 56, 52, 54, 58funcf2 17830 . . . . . . . 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 484 . . . . . . . 8 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦))
6260, 61ffvelcdmd 7033 . . . . . . 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 18205 . . . . . 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 727 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝐹 ∈ (𝐸 Func 𝐷))
6510ad2antrr 727 . . . . . . 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 17848 . . . . . 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 727 . . . . . . 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 18205 . . . . . 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 2782 . . . . 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 6982 . . . 4 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))𝑦) = (𝑥(2nd ‘((1st𝑀)‘𝑋))𝑦))
7137, 38, 70eqfnovd 49357 . . 3 (𝜑 → (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) = (2nd ‘((1st𝑀)‘𝑋)))
7236, 71opeq12d 4825 . 2 (𝜑 → ⟨(1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)), (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))⟩ = ⟨(1st ‘((1st𝑀)‘𝑋)), (2nd ‘((1st𝑀)‘𝑋))⟩)
73 relfunc 17824 . . 3 Rel (𝐸 Func 𝐶)
74 1st2nd 7987 . . 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 588 . 2 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) = ⟨(1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)), (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))⟩)
76 1st2nd 7987 . . 3 ((Rel (𝐸 Func 𝐶) ∧ ((1st𝑀)‘𝑋) ∈ (𝐸 Func 𝐶)) → ((1st𝑀)‘𝑋) = ⟨(1st ‘((1st𝑀)‘𝑋)), (2nd ‘((1st𝑀)‘𝑋))⟩)
7773, 18, 76sylancr 588 . 2 (𝜑 → ((1st𝑀)‘𝑋) = ⟨(1st ‘((1st𝑀)‘𝑋)), (2nd ‘((1st𝑀)‘𝑋))⟩)
7872, 75, 773eqtr4d 2782 1 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) = ((1st𝑀)‘𝑋))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1542  wcel 2114  cop 4574   class class class wbr 5086  Rel wrel 5631  cfv 6494  (class class class)co 7362  1st c1st 7935  2nd c2nd 7936  Basecbs 17174  Hom chom 17226  Catccat 17625  Idccid 17626   Func cfunc 17816  func ccofu 17818  Δfunccdiag 18173
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-rep 5213  ax-sep 5232  ax-nul 5242  ax-pow 5304  ax-pr 5372  ax-un 7684  ax-cnex 11089  ax-resscn 11090  ax-1cn 11091  ax-icn 11092  ax-addcl 11093  ax-addrcl 11094  ax-mulcl 11095  ax-mulrcl 11096  ax-mulcom 11097  ax-addass 11098  ax-mulass 11099  ax-distr 11100  ax-i2m1 11101  ax-1ne0 11102  ax-1rid 11103  ax-rnegex 11104  ax-rrecex 11105  ax-cnre 11106  ax-pre-lttri 11107  ax-pre-lttrn 11108  ax-pre-ltadd 11109  ax-pre-mulgt0 11110
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-nel 3038  df-ral 3053  df-rex 3063  df-rmo 3343  df-reu 3344  df-rab 3391  df-v 3432  df-sbc 3730  df-csb 3839  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-pss 3910  df-nul 4275  df-if 4468  df-pw 4544  df-sn 4569  df-pr 4571  df-tp 4573  df-op 4575  df-uni 4852  df-iun 4936  df-br 5087  df-opab 5149  df-mpt 5168  df-tr 5194  df-id 5521  df-eprel 5526  df-po 5534  df-so 5535  df-fr 5579  df-we 5581  df-xp 5632  df-rel 5633  df-cnv 5634  df-co 5635  df-dm 5636  df-rn 5637  df-res 5638  df-ima 5639  df-pred 6261  df-ord 6322  df-on 6323  df-lim 6324  df-suc 6325  df-iota 6450  df-fun 6496  df-fn 6497  df-f 6498  df-f1 6499  df-fo 6500  df-f1o 6501  df-fv 6502  df-riota 7319  df-ov 7365  df-oprab 7366  df-mpo 7367  df-om 7813  df-1st 7937  df-2nd 7938  df-frecs 8226  df-wrecs 8257  df-recs 8306  df-rdg 8344  df-1o 8400  df-er 8638  df-map 8770  df-ixp 8841  df-en 8889  df-dom 8890  df-sdom 8891  df-fin 8892  df-pnf 11176  df-mnf 11177  df-xr 11178  df-ltxr 11179  df-le 11180  df-sub 11374  df-neg 11375  df-nn 12170  df-2 12239  df-3 12240  df-4 12241  df-5 12242  df-6 12243  df-7 12244  df-8 12245  df-9 12246  df-n0 12433  df-z 12520  df-dec 12640  df-uz 12784  df-fz 13457  df-struct 17112  df-slot 17147  df-ndx 17159  df-base 17175  df-hom 17239  df-cco 17240  df-cat 17629  df-cid 17630  df-func 17820  df-cofu 17822  df-nat 17908  df-fuc 17909  df-xpc 18133  df-1stf 18134  df-curf 18175  df-diag 18177
This theorem is referenced by:  prcofdiag  49885
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