Multiplying world crises have left the World Health Organization so short of funds that it needed to use emergency funds to pay staff salaries at the end of last year, an independent report said. The ...

Multiple zeta functions extend the classical Riemann zeta function to several complex variables by involving multiple summations with distinct exponents. These functions not only encapsulate deep ...

We consider an elliptic system of Hamiltonian type on a bounded domain. In the superlinear case with critical growth rates we obtain existence and positivity results for solutions under suitable ...