Department of Mathematics

Monica Torres

MA545, Spring 2013. Office Hours: Monday and Wednesday from 1:30-3:00 p.m. or by appointment.

  • The main focus of this class will be the analysis of functions of Several Variables. We will study differentiablity of functions of Several Variables, Change of Variable Formula, Sobolev functions, approximation of Sobolev functions, Sobolev Imbedding Theorem. Then we will apply these results to the Laplace's equation to obtain the regularity of weakly harmonic functions. In order to accomplish these goals, we will need to study Weak and Strong convergence in L^p, the Riesz Representation Theorem and a brief introduction to the Theory of Distributions. Other topics that will be reviewed are Differentiation of measures, Convolutions, Distribution functions, Covering Theorems. We will use the following books:

    1. Modern Real Analysis, by William Ziemer (with Monica Torres).

    2. Measure Theory and Fine Properties of Functions, by Craig Evans and Ronald Gariepy.

    3. Partial Differential Equations, by Craig Evans.

    Click here to see the book

    Lecture Notes:

    Lecture 1-4: 01/07/2013 through 01/14/2013

    Lecture 5: 01/16/2013

    Lecture 6: 01/18/2013

    Lecture 7: 01/23/2013

    Lecture 8: 01/25/2013

    Lecture 9: 01/28/2013

    Lecture 10: 01/30/2013

    Lecture 11: 02/01/2013

    Lecture 12: 02/04/2013

    Lecture 13: 02/06/2013

    Lecture 14: 02/08/2013

    Lecture 15: 02/11/2013

    Lecture 16: 02/13/2013

    Lecture 17: 02/15/2013

    Lecture 18: 02/18/2013

    Lecture 19: 02/20/2013

    Lecture 20: 02/22/2013

    Lecture 21: 02/25/2013

    Lecture 22: 02/27/2013

    Lecture 23: 03/01/2013

    Lecture 24: 03/04/2013

    Lecture 25: 03/06/2013

    Lecture 26: 03/08/2013

    Lecture 27: 03/18/2013

    Lecture 28: 03/20/2013

    Lecture 29: 03/22/2013

    Lecture 30: 03/25/2013

    Lecture 31: 03/27/2013

    Lecture 32: 03/29/2013

    Lecture 33: 04/3/2013

    Lecture 34: 04/5/2013

    Lecture 35: 04/8/2013

    Lecture 36: 04/10/2013

    Homework

    HW #1: DUE ON FRIDAY 01/25/2013.

    Exercises 8.4, 8.7, 8.10, 8.19, 8.20, 8.26, 8.27, 8.28 (from book #1).

    The problem from chapter 2 ( book #3) that starts with "Show that u_t=u_xx if and only if 4zv"(z)+(2+z)v'(z)=0 ..."

    Extra problem: Show that R^n is reflexive.

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    HW #2: DUE ON FRIDAY 02/8/2013.

    From Book #3; chapter 2: Derive the wave equation from Maxwell's equation.

    From Book#3, chapter 2: Derive the fundamental solution for both the Laplace equation and Heat equation.

    Exercises 9.9 and 9.10 (from Book#1)

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    HW #3: DUE ON FRIDAY 02/22/2013.

    Prove the Global version of the Riesz Representation Theorem (RRT3) given in class

    Exercises 10.1, 10.2 and 10.3 (from Book#1)

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    HW #4: DUE ON FRIDAY 03/08/2013.

    Exercises 10.4, 10.5 and 10.7 (from Book#1)

    Derive the minimal surface equation as explained in class

    Prove the compact version of the Riesz Representation Theorem (RRT3) given in class.

    Prove the Structure Theorem for functions of bounded variation.

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    HW #5: DUE ON FRIDAY 03/29/2013.

    Solve problems in page 11.233 (Lecture 26).

    Solve problems 11.1, 11.2,11.5, 11.6, 11.7 and 11.8 (from Book#1)

    Let U be a bounded open set. Prove that f is Lipschitz in U if and only if f belongs to W^{1,infinity}(U).

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    HW #6: DUE ON FRIDAY 04/12/2013.

    Solve problems 11.9, 11.10, 11.11, 11.12 and 11.13 (from Book#1)