Volume 10, Issue 4 Ilya M. Spitkovsky Stephan Weis Pre-images of extreme points of the numerical range, and applications Downloads Abstract PDF Full article PDF DOI { copied = true; setTimeout(() => copied = false, 2000) })" :aria-label="copied ? 'DOI copied' : 'Copy DOI'" :title="copied ? 'Copied' : 'Copy DOI'" > Find all available articles from these authors Ilya M. Spitkovsky Stephan Weis Find more articles with the same keywords numerical range Find more articles with the same subject classes 47A12 54C10 62F30 94A17