Special functions such as the gamma function and its derivatives (collectively known as polygamma functions) occupy a central position in mathematical analysis, with applications ranging from ...

For novices, functions are one of the most intimidating features of OpenOffice.org's Calc. Newcomers quickly learn that functions are a main feature of spreadsheets, but there are almost four hundred, ...

q-Difference equations occupy a central role in modern mathematical analysis, providing a discrete analogue of differential equations in which the usual derivative is replaced by a finite-difference ...