By Edward Hugh and Claus Vistesen
According to Wikipedia, in complex analysis an essential singularity of a function is a “severe” singularity near which the function exhibits extreme behavior. The category essential singularity is a “left-over” or default group of singularities that are especially unmanageable: by definition they fit into neither of the other two categories of singularity that may be dealt with in some manner – removable singularities and poles.
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Ed was a macro economist based in Barcelona, who specialized in growth and productivity theory, demographic processes and their impact on macro performance, and the underlying dynamics of migration flows.
He was a lovely person and a prolific blogger in his time. Ed’s analyses can be found on his “Don’t Shoot the Messenger” blog on www.economonitor.com, at the India Economy Blog, A Fistful of Euros, Global Economy Matters and Demography Matters. He was a founding member of all these weblogs.