Discrete Mathematics

Discrete Physics

BioPhysics

Foundations of Physics

Cosmology

Discrete Mathematics

Finite Difference Equations

Symmetric Functions

Finite Difference Approach To Trigonometry Adel F. Antippa Journal of Difference Equations & Applications vol. 17 no. 9 pp. 1365 -1400 (2011)	The Combinatorial Structure of Trigonometry Adel F. Antippa International Journal of Mathematics and Mathematical Sciences vol. 2003 no. 8 pp. 475 - 500 (2003)
Recursive Formulation of the Law of Superposition of Velocities Adel F. Antippa Journal of Difference Equations & Applications vol. 13 no. 7 pp. 563 - 575 (2007)
Factorial Polynomials of 2x2 Nonautonomous Matrices Adel F. Antippa Journal of Difference Equations & Applications vol. 10 no. 4 pp. 437 - 446 (2004)	Hypersymmetric Functions and 2x2 Nonautonomous Matrices Adel F. Antippa International Journal of Mathematics and Mathematical Sciences vol. 2004 no. 59 pp. 3151 - 3170 (2004)
Coupled Difference Equations With Variable Coefficients Adel F. Antippa Journal of Difference Equations & Applications vol. 8 no. 3 pp. 255 - 276 (2002)