STOCHASTIC ANALYSIS AND APPLICATIONS Vol. 22, No. 1, pp. 99–111, 2004 Mean Square Stabilizability of Continuous-Time Linear Systems with Partial Information on the Markovian Jumping Parameters Marcelo D. Fragoso 1 * and Oswaldo L. V. Costa 2 1 National Laboratory for Scientific Computing, LNCC/ CNPq, Petrópolis, Rio de Janeiro, Brazil 2 Departamento de Engenharia Eletronica, Escola Politecnica da Universidade de São Paulo, São Paulo, S.P., Brazil ABSTRACT We provide necessary and sufficient conditions for mean square (MS) stabilizability of continuous-time linear systems with Marko- vian jumps in the parameters (LSMJP) subject to partial infor- mation on this jump variable. We assume that the Markovian jump parameter is not exactly known, but instead an estimate of it is available to the controller. Under some additional assump- tions, a solution via LMI (linear matrix inequality) is also provided. Correspondence: Marcelo D. Fragoso, National Laboratory for Scientific Computing, LNCC/CNPq, Av. Getúlio Vargas, Quitandinha, CEP: 25651–075, Petrópolis, Rio de Janeiro, Brazil; E-mail: frag@lncc.br. 99 DOI: 10.1081/SAP-120028025 0736-2994 (Print); 1532-9356 (Online) Copyright © 2004 by Marcel Dekker, Inc. www.dekker.com