A better approximation for balls

Best approximation by linear combinations of characteristic functions of half-spaces

Journal of Approximation Theory

A Sobolev-type upper bound for rates of approximation by linear combinations of Heaviside plane waves

Journal of Approximation Theory

Minimization of error functionals over perceptron networks

Neural Computation

Estimates of Data Complexity in Neural-Network Learning

SOFSEM '07 Proceedings of the 33rd conference on Current Trends in Theory and Practice of Computer Science

Approximation with neural networks activated by ramp sigmoids

Journal of Approximation Theory