Volume 9, Issue 1 Wasin So Changqing Xu A simple sufficient condition for complete positivity 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 Wasin So Changqing Xu Find more articles with the same keywords completely positive doubly nonnegative cp-rank Find more articles with the same subject classes 15A23 15B48 15B57