TY - INPR A1 - PĂ©nisson, Sophie T1 - Continuous-time multitype branching processes conditioned on very late extinction N2 - Multitype branching processes and Feller diffusion processes are conditioned on very late extinction. The conditioned laws are expressed as Doob h-transforms of the unconditioned laws, and an interpretation of the conditioned paths for the branching process is given, via the immortal particle. We study different limits for the conditioned process (increasing delay of extinction, long-time behavior, scaling limit) and provide an exhaustive list of exchangeability results. T3 - Mathematische Statistik und Wahrscheinlichkeitstheorie : Preprint - 2009, 06 Y1 - 2009 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-49548 ER -