Jeffrey S. Geronimo, Hugo J. Woerdeman, Positive Extensions, Fejér-Riesz Factorization and Autoregressive Filters in Two Variables, Annals of Mathematics, Second ...

In addition to measuring levels of air pollution with low-cost sensors, we seek to attribute these pollution levels to specific sources within a community. Our source apportionment tools include ...

Igor Klep, Markus Schweighofer, Pure States, Positive Matrix Polynomials and Sums of Hermitian Squares, Indiana University Mathematics Journal, Vol. 59, No. 3 (2010), pp. 857-874 ...