What is the difference between an http://en.wikipedia.org/wiki/Incidence_matrix" [Broken]. They sound the same to me but this paper says they are different:(adsbygoogle = window.adsbygoogle || []).push({});

http://eprints.pascal-network.org/archive/00005332/01/barber_newton.pdf [Broken]

edit:My guess is that adjacent matrices refer to non directed graphs so the matrix will be symmetric while an incidence matrix also incidence directed graphs so need not be symmetric.

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# Incidence matrix vs Adjacent Matrix

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