@article{e82534b562f54d3cbe75f726ffb8381e,
title = "Acyclic digraphs and eigenvalues of (0, 1)-matrices",
abstract = "We show that the number of acyclic directed graphs with n labeled vertices is equal to the number of n × n (0, 1)-matrices whose eigenvalues are positive real numbers.",
keywords = "(0, 1)-matrix, Acyclic, Digraph, Eigenvalue",
author = "McKay, {Brendan D.} and Oggier, {Pr{\'e}d{\'e}rique E.} and Royle, {Gordon F.} and Sloane, {N. J.A.} and Wanless, {Ian M.} and Wilf, {Herbert S.}",
year = "2004",
language = "English",
volume = "7",
journal = "Journal of Integer Sequences",
issn = "1530-7638",
publisher = "University of Waterloo",
number = "3",
}