Sur une généralisation de la propriété de Darboux
Integral representations of graphs.
Matrices with prescribed similarity class and a prescribed nonprincipal submatrix
Matrices with prescribed characteristic polynomial and submatrices
An additive inverse characteristic polynomial theorem
Infinite ergodic index -actions in infinite measure
We construct infinite measure preserving and nonsingular rank one -actions. The first example is ergodic infinite measure preserving but with nonergodic, infinite conservative index, basis transformations; in this case we exhibit sets of increasing finite and infinite measure which are properly exhaustive and weakly wandering. The next examples are staircase rank one infinite measure preserving -actions; for these we show that the individual basis transformations have conservative ergodic Cartesian...
Controllability indices of partially prescribed pairs of matrices.
On the characteristic polynomial of matrices with prescribed columns and the stabilization and observability of linear systems.
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