# Multivariate Splines and Algebraic Geometry

### From SIAG-AG

## **Overview**

A multivariate spline is a function defined on a domain in $R^d$ with $d>1$ that is piecewise a polynomial. These objects from approximation theory may be studied using techniques from commutative algebra and algebraic geometry. Research interests of the participants relevant to the minisymposium fall broadly under multivariate spline theory, interpolation, and geometric modeling. For instance, a main problem of interest is to study the Hilbert function and algebraic structure of the spline module; recently there have been several advances on this front using notions from algebraic geometry. Nevertheless this problem remains elusive in low degree; the dimension of the space of piecewise cubics on a planar triangulation (especially relevant for applications) is still unknown in general!

## **Organizers**

Michael Di Pasquale (Oklahoma State)

Frank Sottile (Texas A&M)

## **Confirmed Speakers**

Michael Di Pasquale (Oklahoma State)

Bernard Mourrain (INRIA Sophia-Antipolis)

Tatyana Sorokina (Towson University)

Peter F. Stiller (Texas A&M)

Nelly Villamizar (RICAM Linz)

**Likely Speakers**

Oleg Davydov (Universitaet Giessen)

Bert Juettler (Johannes Kepler Universitaet, Linz)

Hendrik Speleers (Universita di Roma 2)

Julianna Tymoczko (Smith College)