8 citations · 9 across the 12 of their papers we have counts for
5 papers · 1 filter
On a family of one-dimensional oscillation inequalities
Fushuai Jiang
Let be a nonzero continuous mean-zero function on the one-dimensional torus and let be the number of times that changes signs. We prove the sharp family of oscillatio…
Factorization of positive-semidefinite operators with absolutely summable entries
Radu Balan, Fushuai Jiang
A problem by Feichtinger, Heil, and Larson asks whether every infinite matrix with (an equivalent substitute for the Feichtinger algebra) that is…
Roots, trace, and extendability of flat nonnegative smooth functions
Fushuai Jiang
Building on the univariate techniques developed by Ray and Schmidt-Hieber, we study the class of multivariate nonnegative smooth functions that are su…
Smooth Selection for Infinite Sets
Fushuai Jiang, Garving K. Luli, Kevin O'Neill
Whitney's extension problem asks the following: Given a compact set and a function , how can we tell whether there exists $F\in C^m(\mathb…
On the Shape Fields Finiteness Principle
Fushuai Jiang, Garving K. Luli, Kevin O'Neill
In this paper, we improve the finiteness constant for the finiteness principles for and selection proven by…