Theorem icoltubd 46118

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

Step	Hyp	Ref	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 46081	. 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ (𝐴[,)𝐵)) → 𝐶 < 𝐵)
5	1, 2, 3, 4	syl3anc 1390	1 ⊢ (𝜑 → 𝐶 < 𝐵)

Syntax hints:   → wi 4   ∈ wcel 2142   class class class wbr 5100  (class class class)co 7396  ℝ^*cxr 11215   < clt 11216  [,)cico 13351

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-10 2175  ax-11 2191  ax-12 2212  ax-ext 2734  ax-sep 5246  ax-pr 5390  ax-un 7718  ax-cnex 11129  ax-resscn 11130

This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-nf 1804  df-sb 2091  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ral 3077  df-rex 3087  df-rab 3415  df-v 3456  df-sbc 3745  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4481  df-pw 4557  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-br 5101  df-opab 5163  df-id 5542  df-xp 5653  df-rel 5654  df-cnv 5655  df-co 5656  df-dm 5657  df-iota 6477  df-fun 6523  df-fv 6529  df-ov 7399  df-oprab 7400  df-mpo 7401  df-xr 11220  df-ico 13355

This theorem is referenced by:  icomnfinre  46125  xlimmnfvlem1  46403  fourierdlem48  46725