author = "Luc {B}run and Walter Kropatsch", institution ="PRIP, TU Wien", number = "PRIP-TR-057", title = "Pyramids with Combinatorial Maps", year = 1999, price = "20,-", theme = {hierarchical}, url = {article:=ftp://www.prip.tuwien.ac.at/pub/publications/trs/tr57.ps.gz}, abstract = "This paper presents a new formalism for irregular pyramids based on combinatorial maps. This technical report continue the work began with the TR-54 report. Definition and properties of Contraction kernels are generalized and completed. The definition and properties of Equivalent contraction kernels are also given. ",