# Monthly Archives: April 2012

## On the Euclidean Growth of Entire Functions

In Mapping properties of analytic functions on the unit disk, Proceedings of the American Mathematical Society, Vol. 135, N. 9 (2007), 2893-2898. I show that there is a universal constant such that whenever is analytic in the unit disk and … Continue reading

## Square-roots of Complex Numbers

If is a complex number in polar coordinates, with say , then one of its square-roots is . But what if one wants to avoid using the exponential function? This trick was related to me by my colleague Bob Burckel. … Continue reading

## Complex Numbers

A complex number can be written in Cartesian coordinates as , where is the real part and is the imaginary part. Or it can be written in polar coordinates as , where is the absolute value and is the point … Continue reading

## An Elementary Introduction to Data and Statistics

Elementary Introduction to Data and Statistics