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On the Iwasawa -invariants of supersingular elliptic curves

Volume 194 / 2020

Anupam Saikia Acta Arithmetica 194 (2020), 179-186 MSC: Primary 11R23; Secondary 11G05. DOI: 10.4064/aa190213-28-8 Published online: 2 March 2020

Abstract

We explore the relation between the Iwasawa invariants \mu ^{+} and \mu ^{-} associated respectively with the plus and the minus Selmer groups of two elliptic curves E_{1} and E_{2} over \mathbb {Q} having isomorphic Galois representations E_{1}[p^{r}]\cong E_{2}[p^{r}] at a prime p of supersingular reduction. We prove that \mu ^{\pm }(E_{1})=\mu ^{\pm }(E_{2}) if either is less than r, and \mu ^{\pm }(E_{1}), \mu ^{\pm }(E_{2})\geq r if either is greater than or equal to r.

Authors

  • Anupam SaikiaDepartment of Mathematics
    Indian Institute of Technology Guwahati
    Guwahati 781039, Assam, India
    e-mail

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