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Theorem prcofdiag1 49659
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 2736 . . . . . 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 49342 . . . . . . . . . 10 (𝜑 → (1st𝐹)(𝐸 Func 𝐷)(2nd𝐹))
76funcrcl3 49346 . . . . . . . . 9 (𝜑𝐷 ∈ Cat)
8 prcofdiag1.x . . . . . . . . 9 (𝜑𝑋𝐵)
9 eqid 2736 . . . . . . . . 9 ((1st𝐿)‘𝑋) = ((1st𝐿)‘𝑋)
104, 5, 7, 2, 8, 9diag1cl 18167 . . . . . . . 8 (𝜑 → ((1st𝐿)‘𝑋) ∈ (𝐷 Func 𝐶))
113, 10cofucl 17814 . . . . . . 7 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) ∈ (𝐸 Func 𝐶))
1211func1st2nd 49342 . . . . . 6 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))(𝐸 Func 𝐶)(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)))
131, 2, 12funcf1 17792 . . . . 5 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)):(Base‘𝐸)⟶𝐵)
1413ffnd 6663 . . . 4 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) Fn (Base‘𝐸))
15 prcofdiag.m . . . . . . . 8 𝑀 = (𝐶Δfunc𝐸)
166funcrcl2 49345 . . . . . . . 8 (𝜑𝐸 ∈ Cat)
17 eqid 2736 . . . . . . . 8 ((1st𝑀)‘𝑋) = ((1st𝑀)‘𝑋)
1815, 5, 16, 2, 8, 17diag1cl 18167 . . . . . . 7 (𝜑 → ((1st𝑀)‘𝑋) ∈ (𝐸 Func 𝐶))
1918func1st2nd 49342 . . . . . 6 (𝜑 → (1st ‘((1st𝑀)‘𝑋))(𝐸 Func 𝐶)(2nd ‘((1st𝑀)‘𝑋)))
201, 2, 19funcf1 17792 . . . . 5 (𝜑 → (1st ‘((1st𝑀)‘𝑋)):(Base‘𝐸)⟶𝐵)
2120ffnd 6663 . . . 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 2736 . . . . . 6 (Base‘𝐷) = (Base‘𝐷)
261, 25, 6funcf1 17792 . . . . . . 7 (𝜑 → (1st𝐹):(Base‘𝐸)⟶(Base‘𝐷))
2726ffvelcdmda 7029 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st𝐹)‘𝑥) ∈ (Base‘𝐷))
284, 22, 23, 2, 24, 9, 25, 27diag11 18168 . . . . 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 17810 . . . . 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 18168 . . . . 5 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘((1st𝑀)‘𝑋))‘𝑥) = 𝑋)
3528, 32, 343eqtr4d 2781 . . . 4 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))‘𝑥) = ((1st ‘((1st𝑀)‘𝑋))‘𝑥))
3614, 21, 35eqfnfvd 6979 . . 3 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) = (1st ‘((1st𝑀)‘𝑋)))
371, 12funcfn2 17795 . . . 4 (𝜑 → (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) Fn ((Base‘𝐸) × (Base‘𝐸)))
381, 19funcfn2 17795 . . . 4 (𝜑 → (2nd ‘((1st𝑀)‘𝑋)) Fn ((Base‘𝐸) × (Base‘𝐸)))
39 eqid 2736 . . . . . . 7 (Hom ‘𝐸) = (Hom ‘𝐸)
40 eqid 2736 . . . . . . 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 770 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → 𝑥 ∈ (Base‘𝐸))
43 simprr 772 . . . . . . 7 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → 𝑦 ∈ (Base‘𝐸))
441, 39, 40, 41, 42, 43funcf2 17794 . . . . . 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 6663 . . . . 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 17794 . . . . . 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 6663 . . . . 5 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘((1st𝑀)‘𝑋))𝑦) Fn (𝑥(Hom ‘𝐸)𝑦))
495ad2antrr 726 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝐶 ∈ Cat)
507ad2antrr 726 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝐷 ∈ Cat)
518ad2antrr 726 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝑋𝐵)
526ad2antrr 726 . . . . . . . . 9 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → (1st𝐹)(𝐸 Func 𝐷)(2nd𝐹))
531, 25, 52funcf1 17792 . . . . . . . 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 7030 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((1st𝐹)‘𝑥) ∈ (Base‘𝐷))
56 eqid 2736 . . . . . . 7 (Hom ‘𝐷) = (Hom ‘𝐷)
57 eqid 2736 . . . . . . 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 7030 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((1st𝐹)‘𝑦) ∈ (Base‘𝐷))
601, 39, 56, 52, 54, 58funcf2 17794 . . . . . . . 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 7030 . . . . . . 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 18169 . . . . . 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 726 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → 𝐹 ∈ (𝐸 Func 𝐷))
6510ad2antrr 726 . . . . . . 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 17812 . . . . . 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 726 . . . . . . 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 18169 . . . . . 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 2781 . . . . 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 6979 . . . 4 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))𝑦) = (𝑥(2nd ‘((1st𝑀)‘𝑋))𝑦))
7137, 38, 70eqfnovd 49132 . . 3 (𝜑 → (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) = (2nd ‘((1st𝑀)‘𝑋)))
7236, 71opeq12d 4837 . 2 (𝜑 → ⟨(1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)), (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))⟩ = ⟨(1st ‘((1st𝑀)‘𝑋)), (2nd ‘((1st𝑀)‘𝑋))⟩)
73 relfunc 17788 . . 3 Rel (𝐸 Func 𝐶)
74 1st2nd 7983 . . 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 587 . 2 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) = ⟨(1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)), (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))⟩)
76 1st2nd 7983 . . 3 ((Rel (𝐸 Func 𝐶) ∧ ((1st𝑀)‘𝑋) ∈ (𝐸 Func 𝐶)) → ((1st𝑀)‘𝑋) = ⟨(1st ‘((1st𝑀)‘𝑋)), (2nd ‘((1st𝑀)‘𝑋))⟩)
7773, 18, 76sylancr 587 . 2 (𝜑 → ((1st𝑀)‘𝑋) = ⟨(1st ‘((1st𝑀)‘𝑋)), (2nd ‘((1st𝑀)‘𝑋))⟩)
7872, 75, 773eqtr4d 2781 1 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) = ((1st𝑀)‘𝑋))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1541  wcel 2113  cop 4586   class class class wbr 5098  Rel wrel 5629  cfv 6492  (class class class)co 7358  1st c1st 7931  2nd c2nd 7932  Basecbs 17138  Hom chom 17190  Catccat 17589  Idccid 17590   Func cfunc 17780  func ccofu 17782  Δfunccdiag 18137
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 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-rep 5224  ax-sep 5241  ax-nul 5251  ax-pow 5310  ax-pr 5377  ax-un 7680  ax-cnex 11084  ax-resscn 11085  ax-1cn 11086  ax-icn 11087  ax-addcl 11088  ax-addrcl 11089  ax-mulcl 11090  ax-mulrcl 11091  ax-mulcom 11092  ax-addass 11093  ax-mulass 11094  ax-distr 11095  ax-i2m1 11096  ax-1ne0 11097  ax-1rid 11098  ax-rnegex 11099  ax-rrecex 11100  ax-cnre 11101  ax-pre-lttri 11102  ax-pre-lttrn 11103  ax-pre-ltadd 11104  ax-pre-mulgt0 11105
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ne 2933  df-nel 3037  df-ral 3052  df-rex 3061  df-rmo 3350  df-reu 3351  df-rab 3400  df-v 3442  df-sbc 3741  df-csb 3850  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-pss 3921  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4581  df-pr 4583  df-tp 4585  df-op 4587  df-uni 4864  df-iun 4948  df-br 5099  df-opab 5161  df-mpt 5180  df-tr 5206  df-id 5519  df-eprel 5524  df-po 5532  df-so 5533  df-fr 5577  df-we 5579  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-rn 5635  df-res 5636  df-ima 5637  df-pred 6259  df-ord 6320  df-on 6321  df-lim 6322  df-suc 6323  df-iota 6448  df-fun 6494  df-fn 6495  df-f 6496  df-f1 6497  df-fo 6498  df-f1o 6499  df-fv 6500  df-riota 7315  df-ov 7361  df-oprab 7362  df-mpo 7363  df-om 7809  df-1st 7933  df-2nd 7934  df-frecs 8223  df-wrecs 8254  df-recs 8303  df-rdg 8341  df-1o 8397  df-er 8635  df-map 8767  df-ixp 8838  df-en 8886  df-dom 8887  df-sdom 8888  df-fin 8889  df-pnf 11170  df-mnf 11171  df-xr 11172  df-ltxr 11173  df-le 11174  df-sub 11368  df-neg 11369  df-nn 12148  df-2 12210  df-3 12211  df-4 12212  df-5 12213  df-6 12214  df-7 12215  df-8 12216  df-9 12217  df-n0 12404  df-z 12491  df-dec 12610  df-uz 12754  df-fz 13426  df-struct 17076  df-slot 17111  df-ndx 17123  df-base 17139  df-hom 17203  df-cco 17204  df-cat 17593  df-cid 17594  df-func 17784  df-cofu 17786  df-nat 17872  df-fuc 17873  df-xpc 18097  df-1stf 18098  df-curf 18139  df-diag 18141
This theorem is referenced by:  prcofdiag  49660
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