The Centrum Wiskunde & Informatica and Leiden University (UL) expand their cooperation. The Mathematical Institute (MI), Leiden Institute of Advanced Computer Science (LIACS) and CWI signed an agreement that makes it possible to exchange part-time researchers between the institutes. At the meeting On the bridge between UL and CWI on 10 April 2008 in Leiden several speakers presented their joint research projects. After which general directors Peter Stevenhagen from MI (right), Joost Kok from LIACS (left) and Jan Karel Lenstra from CWI (middle) signed the agreement. To confirm the cooperation Jan Karel Lenstra surprised Leiden University with two ingeniously shaped bookends with inscription.