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Theorem hof1 18148
Description: The object part of the Hom functor maps 𝑋, 𝑌 to the set of morphisms from 𝑋 to 𝑌. (Contributed by Mario Carneiro, 15-Jan-2017.)
Hypotheses
Ref Expression
hofval.m 𝑀 = (HomF𝐶)
hofval.c (𝜑𝐶 ∈ Cat)
hof1.b 𝐵 = (Base‘𝐶)
hof1.h 𝐻 = (Hom ‘𝐶)
hof1.x (𝜑𝑋𝐵)
hof1.y (𝜑𝑌𝐵)
Assertion
Ref Expression
hof1 (𝜑 → (𝑋(1st𝑀)𝑌) = (𝑋𝐻𝑌))

Proof of Theorem hof1
StepHypRef Expression
1 hofval.m . . . 4 𝑀 = (HomF𝐶)
2 hofval.c . . . 4 (𝜑𝐶 ∈ Cat)
31, 2hof1fval 18147 . . 3 (𝜑 → (1st𝑀) = (Homf𝐶))
43oveqd 7375 . 2 (𝜑 → (𝑋(1st𝑀)𝑌) = (𝑋(Homf𝐶)𝑌))
5 eqid 2733 . . 3 (Homf𝐶) = (Homf𝐶)
6 hof1.b . . 3 𝐵 = (Base‘𝐶)
7 hof1.h . . 3 𝐻 = (Hom ‘𝐶)
8 hof1.x . . 3 (𝜑𝑋𝐵)
9 hof1.y . . 3 (𝜑𝑌𝐵)
105, 6, 7, 8, 9homfval 17577 . 2 (𝜑 → (𝑋(Homf𝐶)𝑌) = (𝑋𝐻𝑌))
114, 10eqtrd 2773 1 (𝜑 → (𝑋(1st𝑀)𝑌) = (𝑋𝐻𝑌))
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1542  wcel 2107  cfv 6497  (class class class)co 7358  1st c1st 7920  Basecbs 17088  Hom chom 17149  Catccat 17549  Homf chomf 17551  HomFchof 18142
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2155  ax-12 2172  ax-ext 2704  ax-rep 5243  ax-sep 5257  ax-nul 5264  ax-pow 5321  ax-pr 5385  ax-un 7673
This theorem depends on definitions:  df-bi 206  df-an 398  df-or 847  df-3an 1090  df-tru 1545  df-fal 1555  df-ex 1783  df-nf 1787  df-sb 2069  df-mo 2535  df-eu 2564  df-clab 2711  df-cleq 2725  df-clel 2811  df-nfc 2886  df-ne 2941  df-ral 3062  df-rex 3071  df-reu 3353  df-rab 3407  df-v 3446  df-sbc 3741  df-csb 3857  df-dif 3914  df-un 3916  df-in 3918  df-ss 3928  df-nul 4284  df-if 4488  df-pw 4563  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4867  df-iun 4957  df-br 5107  df-opab 5169  df-mpt 5190  df-id 5532  df-xp 5640  df-rel 5641  df-cnv 5642  df-co 5643  df-dm 5644  df-rn 5645  df-res 5646  df-ima 5647  df-iota 6449  df-fun 6499  df-fn 6500  df-f 6501  df-f1 6502  df-fo 6503  df-f1o 6504  df-fv 6505  df-ov 7361  df-oprab 7362  df-mpo 7363  df-1st 7922  df-2nd 7923  df-homf 17555  df-hof 18144
This theorem is referenced by:  yon11  18158  yonedalem21  18167
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