Volume 8, Issue 2 R. T. W. Martin Near invariance and symmetric 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 R. T. W. Martin Find more articles with the same keywords symmetric operators Hardy spaces model subspaces nearly invariant Find more articles with the same subject classes 30H10 46E22 47B25 47B32