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Theorem iccgelbd 46360
Description: An element of a closed interval is more than or equal to its lower bound. (Contributed by Glauco Siliprandi, 26-Jun-2021.)
Hypotheses
Ref Expression
iccgelbd.1 (𝜑𝐴 ∈ ℝ*)
iccgelbd.2 (𝜑𝐵 ∈ ℝ*)
iccgelbd.3 (𝜑𝐶 ∈ (𝐴[,]𝐵))
Assertion
Ref Expression
iccgelbd (𝜑𝐴𝐶)

Proof of Theorem iccgelbd
StepHypRef Expression
1 iccgelbd.1 . 2 (𝜑𝐴 ∈ ℝ*)
2 iccgelbd.2 . 2 (𝜑𝐵 ∈ ℝ*)
3 iccgelbd.3 . 2 (𝜑𝐶 ∈ (𝐴[,]𝐵))
4 iccgelb 13457 . 2 ((𝐴 ∈ ℝ*𝐵 ∈ ℝ*𝐶 ∈ (𝐴[,]𝐵)) → 𝐴𝐶)
51, 2, 3, 4syl3anc 1398 1 (𝜑𝐴𝐶)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wcel 2145   class class class wbr 5107  (class class class)co 7416  *cxr 11269  cle 11271  [,]cicc 13403
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-10 2178  ax-11 2194  ax-12 2215  ax-ext 2734  ax-sep 5255  ax-pr 5402  ax-un 7739  ax-cnex 11183  ax-resscn 11184
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-nf 1817  df-sb 2100  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ral 3079  df-rex 3089  df-rab 3415  df-v 3455  df-sbc 3743  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4283  df-if 4486  df-pw 4562  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4871  df-br 5108  df-opab 5172  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-iota 6493  df-fun 6539  df-fv 6545  df-ov 7419  df-oprab 7420  df-mpo 7421  df-xr 11274  df-icc 13407
This theorem is used by:  sqrlearg  46370
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