most citedComplex Hadamard matrices and the Spectral Set Conjecture

151 citations · 155 across the 2 of their papers we have counts for

collaborators

3 papers

math.CA2004★ 151 cited

Complex Hadamard matrices and the Spectral Set Conjecture

Mihail N. Kolountzakis, Mate Matolcsi

By analyzing the connection between complex Hadamard matrices and spectral sets we prove the direction ``spectral -> tile'' of the Sectral Set Conjecture for all sets A of size at…

math.CA2004★ 4 cited

Tiles with no spectra

Mihail N. Kolountzakis, Mate Matolcsi

We exhibit a subset of a finite Abelian group, which tiles the group by translation, and such that its tiling complements do not have a common spectrum (orthogonal basis for their…

math.FA2001

Counterexample to the Trotter product formula for projections

Mate Matolcsi, Roman Shvidkoy

We constructed a unitary semigroup on a Hilbert space and an orthogonal projection such that the limit does…