For a rational matrix function Φ with poles outside the unit circle, we estimate the degree of the unique superoptimal approximation 𝒜Φ by matrix functions analytic in the unit disk. We obtain sharp ...

This is a preview. Log in through your library . Abstract Finite impulse response (FIR) models are among the most basic tools in control theory and signal processing and are routinely used in almost ...

I’ve written about AI’s capabilities and limitations fairly often, exploring topics like the challenges of using AI to personalize decisions, how its reliance on past data shapes its predictive power, ...