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Condition numbers and scale free graphs

Gabriel Acosta·Matías Graña·Juan Pablo Pinasco
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Abstract

In this work we study the condition number of the least square matrix corresponding to scale free networks. We compute a theoretical lower bound of the condition number which proves that they are ill conditioned. Also, we analyze several matrices from networks generated with the linear preferential attachment model showing that it is very difficult to compute the power law exponent by the least square method due to the severe lost of accuracy expected from the corresponding condition numbers.

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Gabriel Acosta, Matías Graña, Juan Pablo Pinasco. 2006-02-10. Condition numbers and scale free graphs. https://doi.org/10.1140/epjb%2Fe2006-00377-4

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