I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those ...

Learn how to determine the domain and range of a function given the graph of the function. Since the domain of a function is ...

The statistical physics of graphs and partition functions represents a vibrant intersection of graph theory, statistical mechanics and computational complexity. By summing over an ensemble of ...

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, ...