  Special functions are often defined as a Fourier or Laplace transform of a
positive measure, and the positivity of the measure manifests as positive
definiteness of certain matrices. The purpose of this expository note is to
give a sample of such positive definite matrices to demonstrate this connection
for some well-known special functions such as Gamma, Beta, hypergeometric,
theta, elliptic, zeta and basic hypergeometric functions.
