On Fabry’s Quotient Theorem

Lev Buhovsky*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present a short proof of the Fabry quotient theorem, which states that for a complex power series with unit radius of convergence, if the quotient of its consecutive coefficients tends to s, then the point (Formula presented.) is a singular point of the series. This proof only uses material from undergraduate university studies.

Original languageEnglish
Pages (from-to)344-351
Number of pages8
JournalAmerican Mathematical Monthly
Volume129
Issue number4
DOIs
StatePublished - 2022

Funding

FundersFunder number
European Commission757585
Israel Science Foundation2026/17

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