selected publications

• academic article

  • Rational Cohomology Algebra of Mapping Spaces between Complex Grassmannians.  International Journal of Mathematics and Mathematical Sciences.  2020:1-4. 2020
  • Rationalized evaluation subgroups of mapping spaces between complex Grassmannians.  Afrika Matematika.  31:297-303. 2020
  • Pythagorean Triples with Common Sides.  Journal of Mathematics.  2019:1-8. 2019
  • Rational homotopy of mapping spaces between complex Grassmannians.  Quaestiones Mathematicae.  1-12. 2019
  • The Laguerre Type Operator in a Left Definite Hilbert Space.  Journal of Mathematical Analysis and Applications.  192:460-468. 1995
  • Differential operators and the Laguerre type polynomials.  SIAM journal on mathematical analysis.  23:722-736. 1992
  • Differential operators of certain special functions and their applications to linear differential equations.  International Journal of Mathematical Education in Science and Technology.  19:435-442. 1988
  • Laguerre polynomials and singular differential operators.  Indian Journal of Pure and Applied Mathematics.  18:515-535. 1987
  • Taylor's theorem for a function of several variablesClassroom notes.  International Journal of Mathematical Education in Science and Technology.  18:315-323. 1987
  • Tchebichef polynomials of the second kind and sihculas differertial operators.  International atomic energy agency and united matrons educational scientific and cultural organization - International center for theoretical physics.  1985

• report

  • Differential operators associated with Gegenbauer polynomials-3. the regular case 1989
  • Differential operators associated with Hermite polynomials 1989
  • On some properties of the Laguerre-type differential operators 1989
  • Differential operators associated with Gegenbauer polynomials-1: the limit-circle case 1987
  • The Bessel polynomials and their differential operators 1987
  • A note on Gegenbauer's differential operators and their applications to linear differential equations 1985
  • A problem of Tchebichef polynomials of the first kind and regular differential operators 1985
  • Tchebichef polynomials of the second kind and singular differential operators 1985

• thesis

  • The application of ordinary differential operators to the study of the classical orthogonal polynomials 1980