His distribution is one over the product of pi and one plus x squared.  
His distribution is one over the product of pi and one plus x squared.  His theorem states that the integral over a closed curve of an analytic complex function is zero if there are no singular points within the curve.  He developed two criteria to test for the convergence of infinite series.  For 10 points, name this baron who introduced clear and rigorous methods into mathematics with three great treatises published in French between 1821 and 1828.
His distribution is one over the product of pi and one plus x squared.  
Augustin-Louis, Baron Cauchy