Abstract
We study the relation between the intrinsic and the spatial numerical ranges with the recently introduced “approximated” spatial numerical range. As the main result, we show that the intrinsic numerical range always coincides with the convex hull of the approximated spatial numerical range. Besides, we show sufficient conditions and necessary conditions to assure that the approximated spatial numerical range coincides with the closure of the spatial numerical range.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have