Collection of numerical routines used by various other (mainly color) code. Included are: numsup Error handling, vector/array allocation, macros dnsq Non-linear equation solver powell Powell and Conjugate Gradient multi dimentional minimiser ludecomp LU decomposition matrix solver svd Singular Value decomposition matrix solver zbrent 1 dimentional brent root search rand Random number generators sobolo Sobol sub-random vector sequence generator