This week, a centuries-old geometric exercise that is easier than it looks, and a disputed division of a soft drink between a ...

Tuesday's Google Doodle celebrates the quadratic equation. Image courtesy of Google Sept. 9 (UPI) --Google is celebrating the start of the 2025-26 school year with a quadratic equation-themed Doodle.

Abstract: Estimating low-rank positive-semidefinite (PSD) matrices from symmetric rank-one measurements is of great importance in many applications, such as high-dimensional data processing, quantum ...

Abstract: An iterative algorithm to solve periodic Riccati differential equations (PRDE) with an indefinite quadratic term is proposed. In our algorithm, we replace the problem of solving a PRDE with ...