What do the years 2018, 2029 and 2040 have in common? They are the only years in the 21st century when Easter Sunday occurs on April Fools Day.... read more >>

ContentsSimulatorAnimationFirst frameFinal frameFull barrierNo barrierLarger populationSmaller populationSoftwareSimulator help covid19 Epidemic simulation. Inspired by Washington Post... read more >>

My MATLAB® program, amaze, generates mazes by combining old friends, numgrid and delsq, with a new friend, the graph object. Let's see how we make this example maze.... read more >>