Theorem iccleub 13405

Description: An element of a closed interval is less than or equal to its upper bound. (Contributed by Jeff Hankins, 14-Jul-2009.)

Assertion

Ref	Expression
iccleub	⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐶 ≤ 𝐵)

Proof of Theorem iccleub

Step	Hyp	Ref	Expression
1		elicc1 13393	. . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵)))
2		simp3 1151	. . 3 ⊢ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵) → 𝐶 ≤ 𝐵)
3	1, 2	biimtrdi 255	. 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) → 𝐶 ≤ 𝐵))
4	3	3impia 1130	1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐶 ≤ 𝐵)

Syntax hints:   → wi 4   ∧ wa 399   ∧ w3a 1098   ∈ wcel 2142   class class class wbr 5100  (class class class)co 7396  ℝ^*cxr 11215   ≤ cle 11217  [,]cicc 13352

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-icc 13356

This theorem is referenced by:  supicc  13505  supiccub  13506  supicclub  13507  oprpiece1res1  25010  ivthlem1  25510  isosctrlem1  26880  ttgcontlem1  29082  broucube  38150  mblfinlem1  38153  ftc1cnnclem  38187  ftc2nc  38198  areaquad  43790  isosctrlem1ALT  45506  lefldiveq  45868  eliccelioc  46094  iccintsng  46096  eliccnelico  46102  eliccelicod  46103  inficc  46107  iccdificc  46112  iccleubd  46121  cncfiooiccre  46466  itgioocnicc  46548  itgspltprt  46550  itgiccshift  46551  fourierdlem1  46679  fourierdlem20  46698  fourierdlem24  46702  fourierdlem25  46703  fourierdlem27  46705  fourierdlem43  46721  fourierdlem44  46722  fourierdlem50  46727  fourierdlem51  46728  fourierdlem52  46729  fourierdlem64  46741  fourierdlem73  46750  fourierdlem76  46753  fourierdlem79  46756  fourierdlem81  46758  fourierdlem92  46769  fourierdlem102  46779  fourierdlem103  46780  fourierdlem104  46781  fourierdlem114  46791  rrxsnicc  46871  salgencntex  46914  sge0p1  46985  hoidmv1lelem3  47164  hoidmvlelem1  47166  hoidmvlelem4  47169