Proving the “discrete” periodic tiling conjecture for high-dimensional lattices is a slightly different problem than proving the continuous version of the conjecture, as there are tilings that are ...

Q We moved into an Eichler home in Palo Alto that was built in the early 1950s. We have two concerns. The gaps between some of the ceiling boards are as large as 9/16" and we can see something black ...

Last Sunday I published on these pages a column about farmland drainage and specifically about pattern tiling, which has become commonplace throughout Minnesota in recent decades to the detriment, I ...