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Necessary and sufficient conditions for the existence of a positive definite solution of the matrix equation X+AtX-1=I
Engwerda, Jacob, (1991)
Necessary and sufficient conditions for the existence of a positive definite solution of the matrix equation X+A*X-1A=Q
Engwerda, Jacob, (1992)
[Review of the book Nonlinear Dynamical Economics and Chaotic Motion, H.W. Lorenz, 1989]
Engwerda, J.C., (1990)