I am an algebraic topologist who is particularly interested in homotopy theory. My research is mostly concerned with "Calculus and its applications" for Goodwillie's calculus of homotopy functors. I am interested in problems which are related to topology, category theory, algebra and algebraic geometry. Here are some of my research projects. (All preprint files are .pdf.)
Ph. D. 2001 University of Illinois Urbana-Champaign, "On Hopf Algebra Type and Rational Calculus Decompositions". Supervised by Randy McCarthy.
Abstract: We show that the Goodwillie tower of homotopy functors to spectra split rationally as a product of their homogeneous layers when evaluated on objects which behave like Hopf algebras in the source category. In particular, functors from spaces to (rational) spectra split when evaluated on suspensions: On vanishing Tate cohomology and decompositions in Goodwillie
calculus , joint with Randy McCarthy. As an example, we provide a decomposition of higher Hochschild homology and show that the decomposition occurs as the splitting of a Goodwillie tower: Higher Order Hochschild Homology and Its Decompositions .
Abstract: We extend the derivation of Goodwillie calculus as a cotriple construction to homotopy functors from unbased model categories to spectra. We show that this model agrees with Goodwillie's construction of the tower of n-excisive approximations to a homotopy functor. We use this model to explain how two proposed models of DeRham cohomology for spectra are homotopy equivalent.
Operads and spectral sequences: joint work with Laura Scull.
Abstract: Given a spectral sequence whose E^2 page consists of algebras over an operad, we give conditions guaranteeing that the spectral sequence converges as an operad algebra. Spectral sequences of operad algebras.
Courses
Students looking for information regarding current courses should consult the relevant blackboard page or e-mail me.
Math 205, Mathematical Explorations (Winter 2008, Winter 2009)
Math 251, Calculus I (Fall 2003, Fall 2004, Winter 2007)