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Research","award":["12ZC1802","20110185110020","61170311"],"award-info":[{"award-number":["12ZC1802","20110185110020","61170311"]}]},{"name":"Chinese Universities Specialized Research Fund for the Doctoral Program","award":["12ZC1802","20110185110020","61170311"],"award-info":[{"award-number":["12ZC1802","20110185110020","61170311"]}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["12ZC1802","20110185110020","61170311"],"award-info":[{"award-number":["12ZC1802","20110185110020","61170311"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Applied Mathematics"],"published-print":{"date-parts":[[2012,1]]},"abstract":"<jats:p>The base set of primitive zero\u2010symmetric sign pattern matrices with zero diagonal is {1, 2, \u2026, 2<jats:italic>n<\/jats:italic> \u2212 1}. 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