Robin Havea- On the Boundary of the Numerical Range

Explore the constructive challenges surrounding the boundary and border of the numerical range in this 28-minute lecture from the Hausdorff Trimester Program on Constructive Mathematics. Delve into the analysis of convexity in numerical ranges and its implications in constructive settings. Examine key concepts such as the T approximation, extreme points, state space, and boundary complexity. Gain insights into the role of business in this mathematical context and understand the significance of world containment and spectrum pain. Investigate the origins of numerical range theory and its evolution in construction settings.

On the boundary of the numerical range
Where it all started
The role of business
In construction setting
Survey
State space
A meaningful numerical range
The T approximation
The extreme point
Treatment
Firmness
Statespace
Limiters
World Containment
Boundary complexity
Spectrum pain
Ocean