|Email:||My user name is johanh and this should be followed by the at sign and then kth.se|
|Phone:||+46 8 790 62 89|
|Fax:||+46 8 790 09 30|
|Address:||Nada, KTH, SE-100 44 Stockholm, Sweden|
|Visiting address:||Osquars backe 2, floor 5, room 1521|
|Home address:||Högstigen 16, 182 73 Stocksund, +46-8-755 2111|
|Cell phone:||+46 70 565 5211|
The safest way to reach me is by email. For the fall of 2013 I am on a sabbatical at the Simon's institute, so do not expect to find me in the office and do not expect the cell phone to work very often.
I am the chairman of the board of Stockholm Mathematics Center SMC and I am also the deputy director of CIAM a center of excellence sponsored by SSF, the foundation for strategic research.
I am an editor for the journals Theory of Computing, Computational Complexity, Random Structures and Algorithms and ACM Transactions on Computation Theory.