MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  inrresf Structured version   Visualization version   GIF version

Theorem inrresf 9968
Description: The right injection restricted to the right class of a disjoint union is a function from the right class into the disjoint union. (Contributed by AV, 27-Jun-2022.)
Assertion
Ref Expression
inrresf (inr ↾ 𝐵):𝐵⟶(𝐴𝐵)

Proof of Theorem inrresf
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 djurf1o 9965 . . 3 inr:V–1-1-onto→({1o} × V)
2 f1ofun 6814 . . 3 (inr:V–1-1-onto→({1o} × V) → Fun inr)
3 ffvresb 7114 . . 3 (Fun inr → ((inr ↾ 𝐵):𝐵⟶(𝐴𝐵) ↔ ∀𝑥𝐵 (𝑥 ∈ dom inr ∧ (inr‘𝑥) ∈ (𝐴𝐵))))
41, 2, 3mp2b 10 . 2 ((inr ↾ 𝐵):𝐵⟶(𝐴𝐵) ↔ ∀𝑥𝐵 (𝑥 ∈ dom inr ∧ (inr‘𝑥) ∈ (𝐴𝐵)))
5 elex 3471 . . . 4 (𝑥𝐵𝑥 ∈ V)
6 opex 5431 . . . . 5 ⟨1o, 𝑥⟩ ∈ V
7 df-inr 9955 . . . . 5 inr = (𝑥 ∈ V ↦ ⟨1o, 𝑥⟩)
86, 7dmmpti 6671 . . . 4 dom inr = V
95, 8eleqtrrdi 2871 . . 3 (𝑥𝐵𝑥 ∈ dom inr)
10 djurcl 9963 . . 3 (𝑥𝐵 → (inr‘𝑥) ∈ (𝐴𝐵))
119, 10jca 521 . 2 (𝑥𝐵 → (𝑥 ∈ dom inr ∧ (inr‘𝑥) ∈ (𝐴𝐵)))
124, 11mprgbir 3083 1 (inr ↾ 𝐵):𝐵⟶(𝐴𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wb 209  wa 401  wcel 2145  wral 3076  Vcvv 3450  {csn 4583  cop 4589   × cxp 5645  dom cdm 5647  cres 5649  Fun wfun 6521  wf 6523  1-1-ontowf1o 6526  cfv 6527  1oc1o 8447  cdju 9950  inrcinr 9952
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2732  ax-sep 5248  ax-nul 5259  ax-pr 5390  ax-un 7734
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ne 2956  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-dif 3901  df-un 3903  df-in 3905  df-ss 3915  df-pss 3918  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-br 5103  df-opab 5167  df-mpt 5186  df-tr 5212  df-id 5542  df-eprel 5547  df-po 5555  df-so 5556  df-fr 5600  df-we 5602  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-rn 5658  df-res 5659  df-ord 6354  df-on 6355  df-lim 6356  df-suc 6357  df-iota 6483  df-fun 6529  df-fn 6530  df-f 6531  df-f1 6532  df-fo 6533  df-f1o 6534  df-fv 6535  df-om 7861  df-1st 7984  df-2nd 7985  df-1o 8454  df-dju 9953  df-inr 9955
This theorem is used by:  inrresf1  9969  updjudhcoinrg  9985  updjud  9986
  Copyright terms: Public domain W3C validator