Gäller från och med: Autumn 2021
Beslutad av: Professor Thomas Johansson
Datum för fastställande: 2021-04-15
Avdelning: Mathematics
Kurstyp: Ren forskarutbildningskurs
Undervisningsspråk: English
Throughout mathematics and physics, linear elliptic partial differential equations make their appearance. A natural class of operators arising in this context is that of pseudodifferential operators, which after the fact can be described in terms of the class of operators of the form A=f(D) for reasonable functions f and some elliptic partial differential operator D. In particular, the class of pseudodifferential operators contain parametrices and solution operators to elliptic partial differential equations. The purpose of the course is to introduce the details of pseudodifferential calculus, sometimes reducing deep questions about partial differential equations to first year calculus, and to study its consequence in the global analysis of elliptic partial differential equations.
Kunskap och förståelse
För godkänd kurs skall doktoranden
Färdighet och förmåga
För godkänd kurs skall doktoranden
In this course we will study pseudodifferential operators with a view towards global results. Since the 1960s pseudodifferential operators have been used for the study of elliptic differential operators. The highlights from this include the Weyl law describing their spectral behaviour and Atiyah-Singer’s index theorem computing their index. After working through the basic methods of algebraic and analytic flavour, we study their operator theoretic consequences. We shall also consider applications in the study of boundary value problems and Hörmander’s proof of the Weyl law, asymptotically describing the eigenvalues of elliptic pseudodifferential operators.
Chapters XVIII and XX in Shubin's book and Chapters XVIII and XX in Hörmander.
Undervisningsform: Föreläsningar
Examinationsformer: Muntlig tentamen, inlämningsuppgifter
Betygsskala: Underkänd, godkänd
Examinator:
Förutsatta förkunskaper: Basic course on partial differential equations , e.g. FMAN55 Kontinuerliga system. Fourier analysis, basic functional analysis, distribution theory and differential geometry.
Kursansvariga: