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Theorem icoltubd 46665
Description: An element of a left-closed right-open interval is less than its upper bound. (Contributed by Glauco Siliprandi, 26-Jun-2021.)
Hypotheses
Ref Expression
icoltubd.1 (𝜑 → 𝐴 ∈ ℝ*)
icoltubd.2 (𝜑 → 𝐵 ∈ ℝ*)
icoltubd.3 (𝜑 → 𝐶 ∈ (𝐴[,)𝐵))
Assertion
Ref Expression
icoltubd (𝜑 → 𝐶 < 𝐵)

Proof of Theorem icoltubd
StepHypRef Expression
1 icoltubd.1 . 2 (𝜑 → 𝐴 ∈ ℝ*)
2 icoltubd.2 . 2 (𝜑 → 𝐵 ∈ ℝ*)
3 icoltubd.3 . 2 (𝜑 → 𝐶 ∈ (𝐴[,)𝐵))
4 icoltub 46628 . 2 ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 < 𝐵)
51, 2, 3, 4syl3anc 1398 1 (𝜑 → 𝐶 < 𝐵)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2144   class class class wbr 5102  (class class class)co 7424  ℝ*cxr 11349   < clt 11350  [,)cico 13485
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-10 2177  ax-11 2193  ax-12 2212  ax-ext 2732  ax-sep 5248  ax-pr 5391  ax-un 7755  ax-cnex 11263  ax-resscn 11264
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-nf 1816  df-sb 2099  df-mo 2564  df-eu 2594  df-clab 2739  df-cleq 2752  df-clel 2835  df-nfc 2909  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-sbc 3739  df-ss 3897  df-dif 4046  df-in 4090  df-un 4150  df-nul 4278  df-if 4482  df-pw 4558  df-sn 4585  df-pr 4587  df-op 4835  df-uni 4867  df-br 5103  df-opab 5167  df-id 5546  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-iota 6497  df-fun 6545  df-fv 6551  df-ov 7427  df-oprab 7428  df-mpo 7429  df-xr 11354  df-ico 13489
This theorem is used by:  icomnfinre  46672  xlimmnfvlem1  46950  fourierdlem48  47272
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