{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T16:43:23Z","timestamp":1753893803725,"version":"3.41.2"},"reference-count":0,"publisher":"The Electronic Journal of Combinatorics","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Electron. J. Combin."],"abstract":"<jats:p>The class of square $(0,1,-1)$-matrices whose rows are nonzero and mutually orthogonal is studied.  This class generalizes the classes of Hadamard and Weighing matrices.  We prove that if there exists an $n$ by $n$ $(0,1,-1)$-matrix whose rows are nonzero, mutually orthogonal and whose first row has no zeros, then $n$ is not of the form $p^k$, $2p^k$ or $3p$ where $p$ is an odd prime, and $k$ is a positive integer.<\/jats:p>","DOI":"10.37236\/1842","type":"journal-article","created":{"date-parts":[[2020,1,11]],"date-time":"2020-01-11T00:23:30Z","timestamp":1578702210000},"source":"Crossref","is-referenced-by-count":2,"title":["Nonexistence Results for Hadamard-like Matrices"],"prefix":"10.37236","volume":"11","author":[{"given":"Justin D.","family":"Christian","sequence":"first","affiliation":[]},{"given":"Bryan L.","family":"Shader","sequence":"additional","affiliation":[]}],"member":"23455","published-online":{"date-parts":[[2004,1,23]]},"container-title":["The Electronic Journal of Combinatorics"],"original-title":[],"link":[{"URL":"https:\/\/www.combinatorics.org\/ojs\/index.php\/eljc\/article\/download\/v11i1n1\/pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.combinatorics.org\/ojs\/index.php\/eljc\/article\/download\/v11i1n1\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2020,1,18]],"date-time":"2020-01-18T00:04:50Z","timestamp":1579305890000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.combinatorics.org\/ojs\/index.php\/eljc\/article\/view\/v11i1n1"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2004,1,23]]},"references-count":0,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2004,1,2]]}},"URL":"https:\/\/doi.org\/10.37236\/1842","relation":{},"ISSN":["1077-8926"],"issn-type":[{"type":"electronic","value":"1077-8926"}],"subject":[],"published":{"date-parts":[[2004,1,23]]},"article-number":"N1"}}