Volume 11, Issue 3 Jiangtao Yuan Caihong Wang Spectrum of (n,k)-quasiparanormal operators 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 Jiangtao Yuan Caihong Wang Find more articles with the same keywords paranormal operator isolated spectral point point spectrum Riesz idempotent approximate point spectrum Find more articles with the same subject classes 47B20 47A10 47A63