Given two polynomials, we find a convergence property of the GCD of the rising factorial and the falling factorial. Based on this property, we present a unified approach to computing the universal denominators as given by Gosper’s algorithm and Abramov’s algorithm for finding rational solutions to linear difference equations with polynomial coefficients.

Terrorism is changing its paradigm. The superb adaptive capability and the diversification of methods financing terrorism give chance to infiltrate into political establishment most vulnerable countries. terrorist criminal syndicates as allies have common methods, structures but never merge their organisations. Their strategic goals remain different.

every year, for realizing the goals of five-year state civil development plan, a great part of state credits and financial resources are spent for investment in national projects, whilst most of national projects are performed with considerable delay. essential objectives of applying this research is design and explanaion of national projects managers’ competencies model, focusing on risk that ...