Introduces minimal torsion curves in isogeny classes of elliptic curves and gives complete characterizations for N a prime power (odd degree) and for CM classes.
Watso n, Odd degree isolated points on x1(n) with rational j-invariant, preprint, available at arxiv.org:2006.14966
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Minimal torsion curves in geometric isogeny classes
Introduces minimal torsion curves in isogeny classes of elliptic curves and gives complete characterizations for N a prime power (odd degree) and for CM classes.