Matthew D. Blair 


Associate Professor Address: Email: Phone: 


Research 
Much of my work has focused on establishing these inequalities for solutions over domains with a boundary. Here the boundary conditions can influence the development of waves and affect the flow of energy. Understanding this phenomena often involves a connection with the field of microlocal analysis. Here one studies waves by carefully localizing them both in space and in direction of propagation. One effective method in this direction is to represent waves as superpositions of "wave packets", approximate solutions which are highly concentrated in both space and in frequency. Wave packet methods continue to be influenced by ideas from both microlocal and harmonic analysis. More recently, I have also investigated L^p estimates on eigenfunctions of the Laplacian on a compact Riemannian manifold. Of particular interest is to investigate how the geometry of the manifold influences the growth of L^p norms in the high frequency limit. This line of work illuminates the size and concentration properties of these vibrational modes, and is thus of great interest, due in part to its close relationship with problems arising in quantum physics. Many of the relevant methods here involve modern approaches to oscillatory integrals, such as multilinear estimates, stemming from recent progress on the restriction and BochnerRiesz conjectures. Here are links to preprints of my work, which has been partially supported by the National Science Foundation, grants DMS0801211 DMS1001529, and DMS1301717: Strichartz estimates for wave equations with coefficients of Sobolev regularity, Communications in Partial Differential Equations, 31 (5), 2006, pp. 649688. Spectral cluster estimates for metrics of Sobolev regularity, Transactions of the AMS, 361 (3), 2009, pp. 12091240. Strichartz estimates for Schrödinger operators in compact manifolds with boundary (with H. Smith and C. Sogge), Proceedings of the AMS., 136 (1), 2008, pp. 247256. On multilinear spectral cluster estimates for manifolds with boundary (with H. Smith and C. Sogge), Mathematical Research Letters, 15 (3), 2008, pp. 419426 Strichartz estimates for the wave equation on manifolds with boundary (with H. Smith and C. Sogge), Annales de l'Institut Henri Poincare, Analyse Non Lineaire, 26, 2009, pp. 18171829. Strichartz estimates for the Schrödinger equation on polygonal domains (with G. A. Ford, S. Herr, and J. L. Marzuola), Journal of Geometric Analysis, 22 (2), 2012, 339351. Strichartz estimates and the nonlinear Schrödinger equation on manifolds with boundary (with H. Smith and C. Sogge), Mathematische Annalen, 354 (4), 2012, 13971430. Strichartz estimates for the wave equation on flat cones (with G. A. Ford and J. L. Marzuola), International Mathematics Research Notices, 2013 (3), 2013, 562591. L^q bounds on restrictions of spectral clusters to submanifolds for low regularity metrics, Analysis & PDE, 6 (6), 2013, 1263–1288. On refined local smoothing estimates for the Schrödinger equation in exterior domains, Communications in Partial Differential Equations, 39 (5), 2014, 781805. On KakeyaNikodym averages, L^pnorms and lower bounds for nodal sets of eigenfunctions in higher dimensions (with C. Sogge), Journal of the European Mathematical Society, 17 (10), 2015, 25132543. Refined and microlocal KakeyaNikodym bounds for eigenfunctions in two dimensions (with C. Sogge), Analysis & PDE, 8 (3), 2015, 747764. Strichartz and Localized Energy Estimates for the Wave Equation in Strictly Concave Domains, to appear, American Journal of Mathematics. L^p bounds on spectral clusters associated to polygonal domains (with G. A. Ford and J. L. Marzuola), submitted. Refined and Microlocal KakeyaNikodym Bounds of Eigenfunctions in Higher Dimensions (with C. Sogge), submitted. Concerning Toponogov's Theorem and logarithmic improvement of estimates of eigenfunctions (with C. Sogge), submitted. Slides:Strichartz estimates for the Schrödinger equation in exterior domains (Beijing Conference in Harmonic Analysis and Partial Differential Equations, IAPCM, May 1723) Strichartz estimates in polygonal domains and cones (seminar talk at Michigan State University) Analysis Seminar:Fall 2015 



Teaching 
Spring 2016
Fall 2015
Spring 2014
Fall 2013
Spring 2013
Fall 2012
Spring 2012
Fall 2011
Spring 2011
Spring 2010
Fall 2009
Fall 2008Spring 2009





