Ruka hadi maudhui
The Lumenary
Mwaka wa kwanza wa uzamiliAnalysisImepangwa

Measure theory and integration

σ-algebras and measures, Lebesgue measure, measurable functions and the Lebesgue integral, the monotone and dominated convergence theorems, product measures and Fubini–Tonelli, and Lᵖ spaces.

math.analysis.measure-theory

Somo la mada hii bado halijaandikwa. Muhtasari ulio hapa chini ni sehemu ya ramani ya mtaala na haujakaguliwa.

Inajengwa juu ya

Masharti ya awali ya lazima 38 (hadi chini kabisa)

Utajifunza

  • Construct Lebesgue measure from outer measure using Carathéodory's criterion.
  • Prove and apply the monotone and dominated convergence theorems.
  • Apply the Fubini–Tonelli theorem, and prove that Lᵖ spaces are complete.

Fasili

  • A σ-algebra on X is a collection of subsets of X that contains X and is closed under complements and countable unions.
  • A measure is a countably additive function μ from a σ-algebra to [0, ∞] with μ(∅) = 0.
  • Lᵖ(μ) consists of measurable functions f with ∫ |f|ᵖ dμ < ∞, with functions equal almost everywhere identified.

Nadharia

  • Dominated convergence theorem.
  • Fubini–Tonelli theorem for σ-finite measure spaces.
  • Lᵖ(μ) is a Banach space for 1 ≤ p ≤ ∞ (Riesz–Fischer).
  • Every Riemann-integrable function on [a, b] is Lebesgue integrable, with the same integral.

Mawazo potofu ya kawaida

  • Thinking sets of measure zero must be countable; the Cantor set is uncountable and has measure zero.
  • Interchanging limits and integrals without a domination or monotonicity hypothesis.

Inaelekea kwa

Ugunduzi wa hiari

Njia za kujifunza

Usomaji zaidi

  • Gerald B. Folland, Real Analysis: Modern Techniques and Their Applications
  • Elias M. Stein and Rami Shakarchi, Real Analysis: Measure Theory, Integration, and Hilbert Spaces (2005)