In analysis, you also use 0**0 = 1 all the time. It's the only sensible convention for power series. It's really just a bit unfortunate that (x, y) -> x**y is

In analysis, you also use 0**0 = 1 all the time. It's the only sensible convention for power series. It's really just a bit unfortunate that (x, y) -> x**y is not continuous at (0, 0).