Ivan Ivanov

Improved methods and starting values to solve the matrix equations $X\pm A^*X^{-1}A=I$ iteratively

Ivan Ivanov, Vejdi I. Hasanov, Frank Uhlig · Mathematics of Computation · 2004 · 80 citations · Full text

Numerical Analysis, Numerical Computation, Engineering +9

On matrix equations X±A*X−2A=I

Ivan Ivanov, Vejdi I. Hasanov, Borislav V. Minchev · Linear Algebra and its Applications · 2001 · 63 citations

Matrix Equations, Matrix Method, Matrix Theory +1

Properties of positive definite solutions of the equation X + A∗XA = I

Ivan Ivanov, Salah M. El‐Sayed · Linear Algebra and its Applications · 1998 · 59 citations

Positive Definite Solutions

On two perturbation estimates of the extreme solutions to the equations X±A*X−1A=Q

Vejdi I. Hasanov, Ivan Ivanov · Linear Algebra and its Applications · 2005 · 53 citations

Spectral Theory, Extreme Solutions, Elliptic Equation +2

Solutions and perturbation estimates for the matrix equations

Vejdi I. Hasanov, Ivan Ivanov · Applied Mathematics and Computation · 2003 · 46 citations

Matrix Method, Perturbation Method, Matrix Analysis +1