I am studying Analytic Perturbation Theory from Kato's book.But sometimes I find it really difficult to follow.(e.g. In Chapter 2 , he directly talks about algebraic singularities without defining it and many more things). Is there any other book which covers same topics in more detail ?
2026-03-29 19:09:46.1774811386
Alternative reference request for Kato's Perturbation Theory
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