The paper applies Picard-Lefschetz theory to the distribution characters of infinite dimensional representations of semisimple Lie groups and analyzes their asymptotic behavour at the identity.

Suppose G(R) is a real reductive group, with L-group ∨ G, and φ : WR → ∨ G is an L-homomorphism. There is a close relationship between the Lpacket associated to φ and characters the component group of the centralizer of the image of φ. This was originally observed by Shelstad [10], and further refined by Arthur, Kottwitz, Langlands and Shelstad. This is reinterpreted in [3], to (among other thi...

In this paper we describe the experiences we had at our group in building synthetic characters for virtual story telling and games applications. We provide an analysis framework useful to classify the autonomy of synthetic characters versus the control of the users over those characters. In this framework we distinguish between several types of autonomy of characters, in particular: scripted; p...

This paper presents a hybrid conversation group of talking heads, and discusses some solutions concerning emotions and social-emotional signs in more detail. A hybrid conversation group consists of real and virtual members, which meet to discuss some specific theme. The use of such a group, together with digital storytelling techniques, is a promising way of engaging the user in the exploration...