


Publications:
- Backward error analysis and inverse eigenvalue problems for Hankel and Symmetric-Toeplitz structures, S. S. Ahmad and P. Kanhya, Accepted for publication in
Applied Mathematics and Computations, 2021.
- Perturbation analysis on matrix pencils for two specified eigenpairs of a semisimple eigenvalue with multiplicity two, S. S. Ahmad and P. Kanhya,
Electr. Trans. Num. Anal., 52:370–390, 2020.
- Structured perturbation analysis of sparse matrix pencils with s-specified eigenpairs,, S. S. Ahmad and P. Kanhya,
Linear Algebra Appl., 602:93–119, 2020.
- Perturbation analysis of matrices over a quaternion division algebra, S. S. Ahmad I . Ali, and I. Slapnicar,
Electr. Trans. Num. Anal.,Vol. 54, pp. 128–149, 2021
- Perturbation analysis for palindromic and anti-palindromic nonlinear eigenvalue problems, S. S. AhmadElectr. Trans. Num. Anal. (ETNA), Vol. 51, pp. 151–168, 2019
- Sensitivity Analysis of Nonlinear Eigenproblems, R Alam and S. S. Ahmad, SIAM J. Matrix Anal. Appl., 40, pp.672-695, 2019.
- Localization theorems
for matrices and bounds for the zeros of polynomials over a quaternion
division algebra, S. S. Ahmad and I. Ali, Filomat , Vol. 32, pp. 553-573, 2018.
- Backward errors and pseudospectra for structured nonlinear
eigenvalue problems, S. S. Ahmad and V. Mhermann, Operators and Matrices , Vol. 10, pp. 539-556,2016.
- Bounds for eigenvalues of matrix polynomials over quaternion division algebra, S. S. Ahmad and I. Ali, Advances in Applied Clifford Algebras , Vol. 26, pp. 1095-1125,2016.
- Wilkinson's problem for matrix pencils, S. S. Ahmad and R. Alam, The electronic J. Linear Algebra (ELA), Vol. 30, pp. 632-648,2015.
- Backward errors for eigenvalues and eigenvectors of Hermitian, skew-Hermitian, H-even and H-odd matrix polynomials, S. S. Ahmad and V. Mehrmann, Linear and Multilinear Algebra (LAMA), Vol. 61, pp. 1244-1266,2013.
- Perturbation analysis for complex symmetric, skew symmetric, even, and odd matrix polynomials, S. S. Ahmad and V. Mehrmann,
ElectronicTransactions on Numerical Analysis (ETNA), Vol. 38, pp. 275-302,2011.
- On Pseudospectra, Critical points and Multiple Eigenvalues of Matrix
Pencils, S.S. Ahmad, R. Alam, and R. Byers, Siam Journal of Matrix Analysis , vol. 31, no.4, pp. 1915-1933, 2010.
- On estimation of Transient Stochastic Stability of Linear Systems, S. S. Ahmad and S. Raha, Stochastic and Dynamics, vol. 10, no. 3, pp. 385-405, 2010.
- Pseudospectra, Critical points and
Multiple Eigenvalues of Matrix Polynomials, S. S. Ahmad and R. Alam, Linear Algebra and its Applications , vol. 430, pp.1171-1195, 2009.
- The Fully Implicit Stochastic-alpha Method for Stiff Stochastic Differential Equations, S. S. Ahmad, Nigam C Parida and S. Raha, Journal of Computational Physics, vol. 228, pp. 8263--8282, 2009.

Dr. Sk. Safique Ahmad
Professor
Mathematics
safique[at]iiti.ac.in