The proof, known to be so hard that a mathematician once offered 10 martinis to whoever could figure it out, uses number ...

If you have experience with R or want a quick way to generate a regression with statsmodels using a pandas DataFrame, you can ...

My dadu, my father’s father, was bipolar: he had long periods of deep depression, when he would barely move or talk, followed by short highs when he had the irrepressible energy of a five-year-old.