TY - GEN AU - Rashad Modhesh Ali Hezzam Asharabi AU - Mahmoud Hamed Annaby , AU - Mohamed zedan Abdalla , TI - On sampling , Operator and approximation theories / PY - 2008/// CY - Cairo : PB - Rashad Modhesh Ali Hezzam Asharabi , KW - Approximation eigenvalues KW - Error analysis KW - Sampling theory N1 - Thesis (Ph.D.) - Cairo University - Faculty Of Science - Department Of Mathematics; Issued also as CD N2 - We aim in this thesis to apply WKS sampling theorem to compute eigenvalues of regular second order eigenvalue problems.We also introuduce two new different technique to compute eigenvalues numerically , the use of Hermite interpolation , the use of the sinc - Gaussian method ER -