ɪn ðæt kˈeɪs ðə mˈeɪtɹɪks ɹɪkˈɑːɾi dˈɪfɹəns ᵻkwˈeɪʒənz mˈeɪ biː ɹᵻplˈeɪst baɪ ðɛɹ ɐsˈoʊsɪˌeɪɾᵻd dɪskɹˈiːttˈaɪm ˌældʒɪbɹˈeɪɪk ɹɪkˈɑːɾi ᵻkwˈeɪʒənz.
In that case the matrix Riccati difference equations may be replaced by their associated discrete-time algebraic Riccati equations.