Welcome to Professor Nathan S. Feldman's Webpage!
Mathematics Department
Washington & Lee University
Lexington, VA
Fall 2022 Teaching Schedule
Monday  Tuesday  Wednesday  Thursday  Friday  
11:0012:00  Math 10201 Calculus 2 Chavis 107 
Math 10201 Calculus 2 Chavis 107 
Math Faculty Meetings 11:3012:15 in Chavis 105 or on Zoom 
Math 10201 Calculus 2 Chavis 107 

12:151:15  Office Hours in Chavis 304 
Office Hours in Chavis 304 
Office Hours in Chavis 304 

1:302:30  Math 22202 Linear Algebra Chavis 105 
Math 22202 Linear Algebra Chavis 105 
Math 22202 Linear Algebra Chavis 105 

2:453:45  Math 10203 Calculus 2 Chavis 105 
Math 10203 Calculus 2 Chavis 105 
Math 10203 Calculus 2 Chavis 105 
Office hours also available by appointment Below are a few links to some cool math sites... http://mypiday.com  find out where your birthday appears within the digits of Pi. https://www.angio.net/pi/piquery.html  the Pi Search page  find up to a million digits of Pi https://www.piday.org  the day to celebrate pi  with pi of of course! https://www.memoryimprovementtips.com/freemathgames.html The Mathematics Genealogy Project.  At this site you can find out who the PhD advisor was for Einstein or for Newton or for any PhD mathematician. My mathematical genealogy starts with me, Nathan Feldman, and then my PhD advisor was John B. Conway, and his Phd advisor was Heron S. Collins, and then it continues this way with Billy James Petis, Edward J. McShane,.., Oskar Bolza, C. Felix Klein, Lipschitz, Dirichlet, Poisson & Fourier, Lagrange & Laplace, Euler, Johann Bernoulli, ..., Leibnniz,... Getting to know Professor Feldman... Why should you study math? What is my research about? Much of my research involves the study of the dynamics of linear operators, which is the study of the predictable and the unpredictable or chaotic behavior of orbits of operators. Two important topics in operator theory are invariant subspaces and cyclic linear operators. My recent research involves investigating convex versions of these classic topics. In particular, investigating closed invariant convex sets for matrices and linear operators and convexcyclic linear operators. Convexcyclic operators are operators for which there is a vector x such that the smallest invariant convex set containing the vector x is dense in the space. These ideas can be studied in both finite and infinite dimensions and in both real and complex Banach and Hilbert spaces. See my recent publications for more details, 