  The Krawtchouck polynomials arise naturally in both coding theory and
probability theory and have been studied extensively from these points of view.
However, very little is known about their irreducibility and Galois properties.
Just like many classical families of orthogonal polynomials (e.g. the Legendre
and Laguerre), the Krawtchouck polynomials can be viewed as special cases of
Jacobi polynomials. In this paper we determine the Newton Polygons of certain
Krawtchouck polynomials and show that they are very similar to those of the
Legendre polynomials (and exhibit new cases of irreducibility). However, we
also show that their Galois groups are significantly more complicated to study,
due to the nature of their coefficients, versus those of other classical
orthogonal families.
