At the University of Jyväskylä working on different topics in geometric measure theory and geometric function theory.
13 Solve in positive integers $n!=m(m+1)$ Feb 2 '11
11 Is there a function defined on real numbers which is continuous from the left, but not from the right, everywhere Nov 14 '13
8 Doubling space without Besicovitch covering theorem? Apr 18 '13