Siegfried Boecherer, Gabriele Nebe
Published 2009-09-07Version 1
The space spanned by theta series of adjoints of maximal even lattices of exact level $N$ and determinant $N^2$ has the Weierstrass property and hence allows to define extremality for arbitrary squarefree level $N$. We find examples of such dual extremal lattices.
Reduction mod $\ell$ of Theta Series of Level $\ell^n$
Quadratic forms and their theta series - infinitesimal aspects
Cubic identities for theta series in three variables
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