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Jun 10, 2014 at 16:43 comment added mike I see. Thanks for pointing me to that related question.
Jun 10, 2014 at 16:28 comment added user39115 Thanks, I m since recently aware of this as I saw in the answers to mathoverflow.net/questions/4329/roots-of-truncations-of-ex-1 . Obviously there are finitely many zeros, I think that in most of the cases they are not real, but I want to know how far they can be from the one of the unperturbed series.
Jun 10, 2014 at 16:25 history answered mike CC BY-SA 3.0