867 citations
- Forschungszentrum JülichDE10 papers
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11 papers · 1 filter
Note on the rank of quadratic twists of Mordell equations
Sungkon Chang
14H52 : Elliptic curves Let E be the elliptic curve given by a Mordell equation y^2=x^3-A where A is an integer. For certain A, we use Stoll's formula to compute a lower bound for…
Spatial Scaling in Model Plant Communities
Tommaso Zillio, Igor Volkov, Jayanth R. Banavar +2
We present an analytically tractable variant of the voter model that provides a quantitatively accurate description of beta-diversity (two-point correlation function) in two tropic…
Ampleness of intersections of translates of theta divisors in an abelian fourfold
O. Debarre, E. Izadi
We prove that the cotangent bundle of a complete intersection of two general translates of the theta divisor of the jacobian of a general curve of genus 4 is ample. From this the s…
Nuclear halo structure from quasielastic charge-exchange reactions
H. F. Arellano, W. G. Love
Neutron and proton densities in the nuclear periphery are investigated within (p,n) charge-exchange isobar transitions. For this purpose we have developed parameter-free optical po…
Galois Groups Via Atkin-Lehner Twists
Pete L. Clark
Using Serre's proposed complement to Shih's Theorem, we obtain PSL_2(F_p) as a Galois group over Q for at least 614 new primes p. Under the assumption that rational elliptic curves…
Pointed trees of projective spaces
Linda Chen, Angela Gibney, Daniel Krashen
We introduce a smooth projective variety which compactifies the space of configurations of distinct points on affine -space modulo translation and homothety. The p…