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Theorem pnfged 13253
Description: Plus infinity is an upper bound for extended reals. (Contributed by Glauco Siliprandi, 5-Feb-2022.)
Hypothesis
Ref Expression
pnfged.1 (𝜑 → 𝐴 ∈ ℝ*)
Assertion
Ref Expression
pnfged (𝜑 → 𝐴 ≤ +∞)

Proof of Theorem pnfged
StepHypRef Expression
1 pnfged.1 . 2 (𝜑 → 𝐴 ∈ ℝ*)
2 pnfge 13252 . 2 (𝐴 ∈ ℝ* → 𝐴 ≤ +∞)
31, 2syl 18 1 (𝜑 → 𝐴 ≤ +∞)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2145   class class class wbr 5103  +∞cpnf 11333  ℝ*cxr 11335   ≤ cle 11337
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-ext 2733  ax-sep 5249  ax-pow 5327  ax-pr 5391  ax-un 7749  ax-cnex 11249  ax-resscn 11250
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2740  df-cleq 2753  df-clel 2836  df-ne 2957  df-nel 3063  df-ral 3078  df-rex 3088  df-rab 3414  df-v 3453  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-br 5104  df-opab 5168  df-xp 5657  df-cnv 5659  df-pnf 11338  df-mnf 11339  df-xr 11340  df-ltxr 11341  df-le 11342
This theorem is used by:  xrlimcnp  27289  lbslelsp  34223  xlimpnfvlem2  46816  xlimliminflimsup  46841  fourierdlem48  47133  fourierdlem113  47198  pimgtpnf2f  47684  pimiooltgt  47689
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