Theorem iccleub 13317

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 13305	. . 3 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵)))
2		simp3 1138	. . 3 ⊢ ((𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵) → 𝐶 ≤ 𝐵)
3	1, 2	biimtrdi 253	. 2 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) → 𝐶 ≤ 𝐵))
4	3	3impia 1117	1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ* ∧ 𝐶 ∈ (𝐴[,]𝐵)) → 𝐶 ≤ 𝐵)

Syntax hints:   → wi 4   ∧ wa 395   ∧ w3a 1086   ∈ wcel 2113   class class class wbr 5098  (class class class)co 7358  ℝ^*cxr 11165   ≤ cle 11167  [,]cicc 13264

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-10 2146  ax-11 2162  ax-12 2184  ax-ext 2708  ax-sep 5241  ax-nul 5251  ax-pr 5377  ax-un 7680  ax-cnex 11082  ax-resscn 11083

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-nf 1785  df-sb 2068  df-mo 2539  df-eu 2569  df-clab 2715  df-cleq 2728  df-clel 2811  df-nfc 2885  df-ral 3052  df-rex 3061  df-rab 3400  df-v 3442  df-sbc 3741  df-dif 3904  df-un 3906  df-in 3908  df-ss 3918  df-nul 4286  df-if 4480  df-pw 4556  df-sn 4581  df-pr 4583  df-op 4587  df-uni 4864  df-br 5099  df-opab 5161  df-id 5519  df-xp 5630  df-rel 5631  df-cnv 5632  df-co 5633  df-dm 5634  df-iota 6448  df-fun 6494  df-fv 6500  df-ov 7361  df-oprab 7362  df-mpo 7363  df-xr 11170  df-icc 13268

This theorem is referenced by:  supicc  13417  supiccub  13418  supicclub  13419  oprpiece1res1  24905  ivthlem1  25408  isosctrlem1  26784  ttgcontlem1  28957  broucube  37855  mblfinlem1  37858  ftc1cnnclem  37892  ftc2nc  37903  areaquad  43458  isosctrlem1ALT  45174  lefldiveq  45540  eliccelioc  45767  iccintsng  45769  eliccnelico  45775  eliccelicod  45776  inficc  45780  iccdificc  45785  iccleubd  45794  cncfiooiccre  46139  itgioocnicc  46221  itgspltprt  46223  itgiccshift  46224  fourierdlem1  46352  fourierdlem20  46371  fourierdlem24  46375  fourierdlem25  46376  fourierdlem27  46378  fourierdlem43  46394  fourierdlem44  46395  fourierdlem50  46400  fourierdlem51  46401  fourierdlem52  46402  fourierdlem64  46414  fourierdlem73  46423  fourierdlem76  46426  fourierdlem79  46429  fourierdlem81  46431  fourierdlem92  46442  fourierdlem102  46452  fourierdlem103  46453  fourierdlem104  46454  fourierdlem114  46464  rrxsnicc  46544  salgencntex  46587  sge0p1  46658  hoidmv1lelem3  46837  hoidmvlelem1  46839  hoidmvlelem4  46842