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Theorem rnressnsn 32934
Description: The range of a restriction to a singleton is a singleton. See dmressnsn 6013. (Contributed by Thierry Arnoux, 25-Jan-2026.)
Assertion
Ref Expression
rnressnsn ((Fun 𝐹𝐴 ∈ dom 𝐹) → ran (𝐹 ↾ {𝐴}) = {(𝐹𝐴)})

Proof of Theorem rnressnsn
StepHypRef Expression
1 funfn 6555 . . . 4 (Fun 𝐹𝐹 Fn dom 𝐹)
2 fnressn 7145 . . . 4 ((𝐹 Fn dom 𝐹𝐴 ∈ dom 𝐹) → (𝐹 ↾ {𝐴}) = {⟨𝐴, (𝐹𝐴)⟩})
31, 2sylanb 592 . . 3 ((Fun 𝐹𝐴 ∈ dom 𝐹) → (𝐹 ↾ {𝐴}) = {⟨𝐴, (𝐹𝐴)⟩})
43rneqd 5919 . 2 ((Fun 𝐹𝐴 ∈ dom 𝐹) → ran (𝐹 ↾ {𝐴}) = ran {⟨𝐴, (𝐹𝐴)⟩})
5 rnsnopg 6212 . . 3 (𝐴 ∈ dom 𝐹 → ran {⟨𝐴, (𝐹𝐴)⟩} = {(𝐹𝐴)})
65adantl 486 . 2 ((Fun 𝐹𝐴 ∈ dom 𝐹) → ran {⟨𝐴, (𝐹𝐴)⟩} = {(𝐹𝐴)})
74, 6eqtrd 2800 1 ((Fun 𝐹𝐴 ∈ dom 𝐹) → ran (𝐹 ↾ {𝐴}) = {(𝐹𝐴)})
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   = wceq 1563  wcel 2145  {csn 4585  cop 4591  dom cdm 5652  ran crn 5653  cres 5654  Fun wfun 6519   Fn wfn 6520  cfv 6525
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-12 2215  ax-ext 2737  ax-sep 5251  ax-nul 5261  ax-pr 5395
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-ne 2961  df-ral 3080  df-rex 3090  df-reu 3371  df-rab 3418  df-v 3459  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-nul 4289  df-if 4484  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4869  df-br 5106  df-opab 5168  df-id 5547  df-xp 5658  df-rel 5659  df-cnv 5660  df-co 5661  df-dm 5662  df-rn 5663  df-res 5664  df-ima 5665  df-iota 6481  df-fun 6527  df-fn 6528  df-f 6529  df-f1 6530  df-fo 6531  df-f1o 6532  df-fv 6533
This theorem is referenced by:  esplyind  33882
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