# Welcome to the Math Department

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## Faculty Search: Dynamical Systems and Spectral Theory.

The Math Department is currently conducting a search in the area of Dynamical Systems and Spectral Theory.

The Virginia Tech Department of Mathematics anticipates a tenure-track opening in Dynamical Systems and Spectral Theory with a start date of August 10, 2019, at our Blacksburg, VA, campus. The successful candidate will have a strong background in dynamical systems and spectral theory. Possible specialties may include, but are not limited to, harmonic analysis, ergodic theory, random matrix theory, aperiodic order, Schrödinger operators, renormalization methods, dispersive dynamics, non-selfadjoint operators, matrix computations or math-biology. The successful candidate will have the opportunity to engage in trans-disciplinary research, curriculum, and/or outreach initiatives with other university faculty working in Virginia Tech’s Destination Areas

For more information see the position listing.

## Announcements

## Featured Research

**Martin Day**- Although the curves in this figure might resemble the veins of a leaf, it actually has little to do with botany. In reality this is the solution to a partial differential equation arising in a simple queueing network problem. Although the figure does not make it apparent, in some places the solution illustrated fails to have derivatives. This requires the differential equation to be understood in an unusual way, using the method of "viscosity solutions" developed in the 1980s. Modern enhancements to the classical method of characteristic curves allows even such nondifferentiable solutions to be built up from a family of curves as in the illustration. Problems in the design and control of networks can be studied these and other methods from nonlinear differential equations, as well as probability and stochastic processes.

Click here for more information about network control problems and partial differential equations methods.