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Theorem prcofdiag1 49388
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 2729 . . . . . 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 49071 . . . . . . . . . 10 (𝜑 → (1st𝐹)(𝐸 Func 𝐷)(2nd𝐹))
76funcrcl3 49075 . . . . . . . . 9 (𝜑𝐷 ∈ Cat)
8 prcofdiag1.x . . . . . . . . 9 (𝜑𝑋𝐵)
9 eqid 2729 . . . . . . . . 9 ((1st𝐿)‘𝑋) = ((1st𝐿)‘𝑋)
104, 5, 7, 2, 8, 9diag1cl 18148 . . . . . . . 8 (𝜑 → ((1st𝐿)‘𝑋) ∈ (𝐷 Func 𝐶))
113, 10cofucl 17795 . . . . . . 7 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) ∈ (𝐸 Func 𝐶))
1211func1st2nd 49071 . . . . . 6 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))(𝐸 Func 𝐶)(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)))
131, 2, 12funcf1 17773 . . . . 5 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)):(Base‘𝐸)⟶𝐵)
1413ffnd 6653 . . . 4 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) Fn (Base‘𝐸))
15 prcofdiag.m . . . . . . . 8 𝑀 = (𝐶Δfunc𝐸)
166funcrcl2 49074 . . . . . . . 8 (𝜑𝐸 ∈ Cat)
17 eqid 2729 . . . . . . . 8 ((1st𝑀)‘𝑋) = ((1st𝑀)‘𝑋)
1815, 5, 16, 2, 8, 17diag1cl 18148 . . . . . . 7 (𝜑 → ((1st𝑀)‘𝑋) ∈ (𝐸 Func 𝐶))
1918func1st2nd 49071 . . . . . 6 (𝜑 → (1st ‘((1st𝑀)‘𝑋))(𝐸 Func 𝐶)(2nd ‘((1st𝑀)‘𝑋)))
201, 2, 19funcf1 17773 . . . . 5 (𝜑 → (1st ‘((1st𝑀)‘𝑋)):(Base‘𝐸)⟶𝐵)
2120ffnd 6653 . . . 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 2729 . . . . . 6 (Base‘𝐷) = (Base‘𝐷)
261, 25, 6funcf1 17773 . . . . . . 7 (𝜑 → (1st𝐹):(Base‘𝐸)⟶(Base‘𝐷))
2726ffvelcdmda 7018 . . . . . 6 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st𝐹)‘𝑥) ∈ (Base‘𝐷))
284, 22, 23, 2, 24, 9, 25, 27diag11 18149 . . . . 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 17791 . . . . 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 18149 . . . . 5 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘((1st𝑀)‘𝑋))‘𝑥) = 𝑋)
3528, 32, 343eqtr4d 2774 . . . 4 ((𝜑𝑥 ∈ (Base‘𝐸)) → ((1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹))‘𝑥) = ((1st ‘((1st𝑀)‘𝑋))‘𝑥))
3614, 21, 35eqfnfvd 6968 . . 3 (𝜑 → (1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) = (1st ‘((1st𝑀)‘𝑋)))
371, 12funcfn2 17776 . . . 4 (𝜑 → (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) Fn ((Base‘𝐸) × (Base‘𝐸)))
381, 19funcfn2 17776 . . . 4 (𝜑 → (2nd ‘((1st𝑀)‘𝑋)) Fn ((Base‘𝐸) × (Base‘𝐸)))
39 eqid 2729 . . . . . . 7 (Hom ‘𝐸) = (Hom ‘𝐸)
40 eqid 2729 . . . . . . 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 17775 . . . . . 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 6653 . . . . 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 17775 . . . . . 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 6653 . . . . 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 17773 . . . . . . . 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 7019 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((1st𝐹)‘𝑥) ∈ (Base‘𝐷))
56 eqid 2729 . . . . . . 7 (Hom ‘𝐷) = (Hom ‘𝐷)
57 eqid 2729 . . . . . . 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 7019 . . . . . . 7 (((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) ∧ 𝑓 ∈ (𝑥(Hom ‘𝐸)𝑦)) → ((1st𝐹)‘𝑦) ∈ (Base‘𝐷))
601, 39, 56, 52, 54, 58funcf2 17775 . . . . . . . 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 7019 . . . . . . 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 18150 . . . . . 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 17793 . . . . . 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 18150 . . . . . 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 2774 . . . . 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 6968 . . . 4 ((𝜑 ∧ (𝑥 ∈ (Base‘𝐸) ∧ 𝑦 ∈ (Base‘𝐸))) → (𝑥(2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))𝑦) = (𝑥(2nd ‘((1st𝑀)‘𝑋))𝑦))
7137, 38, 70eqfnovd 48860 . . 3 (𝜑 → (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹)) = (2nd ‘((1st𝑀)‘𝑋)))
7236, 71opeq12d 4832 . 2 (𝜑 → ⟨(1st ‘(((1st𝐿)‘𝑋) ∘func 𝐹)), (2nd ‘(((1st𝐿)‘𝑋) ∘func 𝐹))⟩ = ⟨(1st ‘((1st𝑀)‘𝑋)), (2nd ‘((1st𝑀)‘𝑋))⟩)
73 relfunc 17769 . . 3 Rel (𝐸 Func 𝐶)
74 1st2nd 7974 . . 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 7974 . . 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 2774 1 (𝜑 → (((1st𝐿)‘𝑋) ∘func 𝐹) = ((1st𝑀)‘𝑋))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1540  wcel 2109  cop 4583   class class class wbr 5092  Rel wrel 5624  cfv 6482  (class class class)co 7349  1st c1st 7922  2nd c2nd 7923  Basecbs 17120  Hom chom 17172  Catccat 17570  Idccid 17571   Func cfunc 17761  func ccofu 17763  Δfunccdiag 18118
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-10 2142  ax-11 2158  ax-12 2178  ax-ext 2701  ax-rep 5218  ax-sep 5235  ax-nul 5245  ax-pow 5304  ax-pr 5371  ax-un 7671  ax-cnex 11065  ax-resscn 11066  ax-1cn 11067  ax-icn 11068  ax-addcl 11069  ax-addrcl 11070  ax-mulcl 11071  ax-mulrcl 11072  ax-mulcom 11073  ax-addass 11074  ax-mulass 11075  ax-distr 11076  ax-i2m1 11077  ax-1ne0 11078  ax-1rid 11079  ax-rnegex 11080  ax-rrecex 11081  ax-cnre 11082  ax-pre-lttri 11083  ax-pre-lttrn 11084  ax-pre-ltadd 11085  ax-pre-mulgt0 11086
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-mo 2533  df-eu 2562  df-clab 2708  df-cleq 2721  df-clel 2803  df-nfc 2878  df-ne 2926  df-nel 3030  df-ral 3045  df-rex 3054  df-rmo 3343  df-reu 3344  df-rab 3395  df-v 3438  df-sbc 3743  df-csb 3852  df-dif 3906  df-un 3908  df-in 3910  df-ss 3920  df-pss 3923  df-nul 4285  df-if 4477  df-pw 4553  df-sn 4578  df-pr 4580  df-tp 4582  df-op 4584  df-uni 4859  df-iun 4943  df-br 5093  df-opab 5155  df-mpt 5174  df-tr 5200  df-id 5514  df-eprel 5519  df-po 5527  df-so 5528  df-fr 5572  df-we 5574  df-xp 5625  df-rel 5626  df-cnv 5627  df-co 5628  df-dm 5629  df-rn 5630  df-res 5631  df-ima 5632  df-pred 6249  df-ord 6310  df-on 6311  df-lim 6312  df-suc 6313  df-iota 6438  df-fun 6484  df-fn 6485  df-f 6486  df-f1 6487  df-fo 6488  df-f1o 6489  df-fv 6490  df-riota 7306  df-ov 7352  df-oprab 7353  df-mpo 7354  df-om 7800  df-1st 7924  df-2nd 7925  df-frecs 8214  df-wrecs 8245  df-recs 8294  df-rdg 8332  df-1o 8388  df-er 8625  df-map 8755  df-ixp 8825  df-en 8873  df-dom 8874  df-sdom 8875  df-fin 8876  df-pnf 11151  df-mnf 11152  df-xr 11153  df-ltxr 11154  df-le 11155  df-sub 11349  df-neg 11350  df-nn 12129  df-2 12191  df-3 12192  df-4 12193  df-5 12194  df-6 12195  df-7 12196  df-8 12197  df-9 12198  df-n0 12385  df-z 12472  df-dec 12592  df-uz 12736  df-fz 13411  df-struct 17058  df-slot 17093  df-ndx 17105  df-base 17121  df-hom 17185  df-cco 17186  df-cat 17574  df-cid 17575  df-func 17765  df-cofu 17767  df-nat 17853  df-fuc 17854  df-xpc 18078  df-1stf 18079  df-curf 18120  df-diag 18122
This theorem is referenced by:  prcofdiag  49389
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