[1] M. Fiedler:
Über eine Ungleichung für positiv definite Matrizen. Math. Nachrichten 23 (1961), 197–199.
MR 0139617
[2] M. Fiedler:
Relations between the diagonal elements of two mutually inverse positive definite matrices. Czechoslovak Math. J. 14(89) (1964), 39–51.
MR 0166206 |
Zbl 0158.28005
[3] M. Fiedler and V. Pták:
A new positive definite geometric mean of two positive definite matrices. Linear Algebra Appl. 251 (1997), 1–20.
MR 1421263