This note introduces and studies an open set of PSL2(C) characters of a nonabelian free group, on which the action of the outer automorphism group is properly discontinuous, and which is strictly larger than the set of discrete, faithful convex-cocompact (i.e. Schottky) characters. This implies, in particular, that the outer automorphism group does not act ergodically on the set of characters w...

An abundance of information regarding the structure of a finite group can be obtained by studying its irreducible characters. Of particular interest are monomial characters — those induced from a linear character of some subgroup — since Brauer has shown that any irreducible character of a group can be written as an integral linear combination of monomial characters. Our primary focus is the cl...

Different web-based learning environments The web gives educators the possibility to integrate proven as well as new methods of teaching. From mail-based doit-yourself courses to interactive audioand video conferencing – the web has the potential to integrate all. In webbased learning environments, the classroom needs not be further away than the nearest Internet-connected PC. Many different de...