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Semistable


When a prime l divides the elliptic discriminant of a elliptic curve E, two or all three roots of E become congruent (mod l). An elliptic curve is semistable if, for all such primes l, only two roots become congruent mod l (with more complicated definitions for p=2 or 3).


See also

Elliptic Curve, Elliptic Discriminant

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Cite this as:

Weisstein, Eric W. "Semistable." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Semistable.html

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