Malgorzata Marciniak, a graduate student in mathematics, will speak on introductory topics in the theory of differentiable manifolds from noon to 1 p.m. on Monday, Sept. 10, in Room G5 of the Rolla Building. Marciniak will continue with a session from noon to 1 p.m. on Wednesday, Sept. 12, in the same room. This is part of a student research seminar series. For more information, contact Dr. Matt Insall at 341-4901 or insall@umr.edu.