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Reference.org
Euclidean random matrix
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<p>Within <a href="/facts/Mathematics/pxTouaz4">mathematics</a>, an <i>N</i>×<i>N</i> Euclidean random matrix  is defined with the help of an arbitrary deterministic function <i>f</i>(r, r′) and of <i>N</i> points {ri} randomly distributed in a region <i>V</i> of <i>d</i>-dimensional <a href="/facts/Euclidean_space/R2UbzmzM">Euclidean space</a>. The element Aij of the matrix is equal to <i>f</i>(ri, rj): Aij = <i>f</i>(ri, rj). </p>