Viazovska's solution of the sphere packing problem in eight dimensions is based on a
remarkable construction of certain special functions using modular forms. Great mathematics …

Let Γ be the hyperbola {(x, y)∈ R 2: xy= 1} and Λ β be the lattice‐cross defined by Λ
β=(Z×{0})∪({0}× β Z) in R 2, where β is a positive real. A result of Hedenmalm and Montes …

In an effort to extend classical Fourier theory, Hedenmalm and Montes-Rodr\'{\i} guez (2011)
found that the function system\[e_m (x)= e^{i\pi mx},\quad e_n^\dagger (x)= e_n (-1/x)= e …

Recently we found that the sufficient condition in the main result of our paper entitled
“Heisenberg uniqueness pairs for the hyperbola, Bull. Lond. Math. Soc. 53 (2021), no. 1, 16 …

If we try for pure complex exponential solutions u (x, y)= eiλx+ iµy, then uxy+ u=(1− λµ) eiλx+
iµy= 0 holds if and only if λµ= 1. Such pure complex exponential solutions are bounded if …