Theorem elicc1 12090

Description: Membership in a closed interval of extended reals. (Contributed by NM, 24-Dec-2006.) (Revised by Mario Carneiro, 3-Nov-2013.)

Assertion

Ref	Expression
elicc1	⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵)))

Proof of Theorem elicc1

Dummy variables 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		df-icc 12053	. 2 ⊢ [,] = (𝑥 ∈ ℝ*, 𝑦 ∈ ℝ* ↦ {𝑧 ∈ ℝ* ∣ (𝑥 ≤ 𝑧 ∧ 𝑧 ≤ 𝑦)})
2	1	elixx1 12055	1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐶 ∈ (𝐴[,]𝐵) ↔ (𝐶 ∈ ℝ* ∧ 𝐴 ≤ 𝐶 ∧ 𝐶 ≤ 𝐵)))

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   ∧ w3a 1031   ∈ wcel 1977   class class class wbr 4583  (class class class)co 6549  ℝ^*cxr 9952   ≤ cle 9954  [,]cicc 12049

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-sep 4709  ax-nul 4717  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ral 2901  df-rex 2902  df-rab 2905  df-v 3175  df-sbc 3403  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-nul 3875  df-if 4037  df-sn 4126  df-pr 4128  df-op 4132  df-uni 4373  df-br 4584  df-opab 4644  df-id 4953  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-iota 5768  df-fun 5806  df-fv 5812  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-xr 9957  df-icc 12053

This theorem is referenced by:  iccid  12091  iccleub  12100  iccgelb  12101  elicc2  12109  elicc4  12111  xrge0neqmnf  12147  elxrge0  12152  lbicc2  12159  ubicc2  12160  difreicc  12175  cnblcld  22388  oprpiece1res1  22558  ovolf  23057  volivth  23181  itg2ge0  23308  itg2const2  23314  taylfvallem1  23915  tayl0  23920  radcnvcl  23975  radcnvle  23978  psercnlem1  23983  eliccelico  28929  xrdifh  28932  unitssxrge0  29274  esumle  29447  esumlef  29451  esumpinfsum  29466  voliune  29619  volfiniune  29620  ddemeas  29626  prob01  29802  elicc3  31481  ftc1cnnclem  32653  ftc1anc  32663  ftc2nc  32664  iocinico  36816  icoiccdif  38597  iblsplit  38858  iblspltprt  38865  itgspltprt  38871  fourierdlem1  39001  iccpartrn  39968