Open Problems of the Lorentz Workshop “Enumeration Algorithms using Structure”

This is a collection of open problems presented at the Lorentz Workshop “Enumeration Algorithms using Structure” which took place at the Lorentz Center of the University of Leiden (The Netherlands), August 24 30, 2015. The workshop brought together researchers interested in various aspects of enumeration algorithms; in particular classical output-sensitive enumeration including output-polynomial and polynomial delay algorithms and the inputsensitive enumeration mainly dealing with exact exponential time enumeration algorithms and combinatorial bounds.