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Theorem pr01ssre 29407
Description: The range of the indicator function is a subset of . (Contributed by Thierry Arnoux, 14-Aug-2017.)
Assertion
Ref Expression
pr01ssre {0, 1} ⊆ ℝ

Proof of Theorem pr01ssre
StepHypRef Expression
1 0re 9919 . 2 0 ∈ ℝ
2 1re 9918 . 2 1 ∈ ℝ
3 prssi 4293 . 2 ((0 ∈ ℝ ∧ 1 ∈ ℝ) → {0, 1} ⊆ ℝ)
41, 2, 3mp2an 704 1 {0, 1} ⊆ ℝ
Colors of variables: wff setvar class
Syntax hints:  wcel 1977  wss 3540  {cpr 4127  cr 9814  0cc0 9815  1c1 9816
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-i2m1 9883  ax-1ne0 9884  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888
This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-ral 2901  df-rex 2902  df-rab 2905  df-v 3175  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-br 4584  df-iota 5768  df-fv 5812  df-ov 6552
This theorem is referenced by:  indsum  29412
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