2 citations · 2 across the 4 of their papers we have counts for
4 papers
Extended visual cryptography systems
Andreas Klein, Markus Wessler
Visual cryptography schemes have been introduced in 1994 by Naor and Shamir. Their idea was to encode a secret image into shadow images and to give exactly one such shadow imag…
The largest small polytopes
Andreas Klein, Markus Wessler
The aim of this paper is the determination of the largest -dimensional polytope with vertices of unit diameter. This is a special case of a more general problem proposed b…
Weak Positivity and Dyson's Lemma
Markus Wessler
We state and prove a version of Dyson's Lemma for a product of smooth projective varieties of arbitrary dimension using positivity methods.
An algebraic proof of Iitaka's Conjecture C_{2,1}
Markus Wessler
We give a proof of Iitaka's Conjecture C_{2,1} using only elementary methods from algebraic geometry. The main point is that, given a non-isotrivial and relatively minimal family f…