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A summability method due to linear differential equations and a uniqueness property of solutions of singular differential equations
Published online by Cambridge University Press: 20 January 2009
Extract
The purpose of this paper is to expose a method which will match a function f(z) existing in a domain D to a formal series whose radius of convergence may be zero. This matching process has to be done in a “natural way”, and has to be “regular”, which means that if a power series converges absolutely in the circle E = {z | |z|<r} then the summability function f(z) produced by our method in the domain D and matched to will coincide with in the domain E∩D. Euler, in his time, matched the function to the power series .
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- Copyright © Edinburgh Mathematical Society 1976