test article by Jon Watson

Sub heading

Blah blah blah blah this was changed The hypotenuse is computed like this:

$f(x) = \int_{-\infty}^\infty\hat f(\xi),e^{2 \pi i \xi x},d\xi$ italics \( f(x) = \int_{-\infty}^\infty\hat f(\xi),e^{2 \pi i \xi x},d\xi \)