DimensionFunction -- an option for specifying custom dimension functions

This package provides a custom dimension function for probabilistically computing the dimension, dimViaBezout. However, in some cases this can be substantially slower than calling the built in function dim. Thus the user may switch to using the built in function, or their own custom dimension function, via the option DimensionFunction => ....

Functions with optional argument named DimensionFunction:

• extendIdealByNonZeroMinor(...,DimensionFunction=>...) -- see extendIdealByNonZeroMinor -- extends the ideal to aid finding singular locus
• findANonZeroMinor(...,DimensionFunction=>...) -- see findANonZeroMinor -- finds a non-vanishing minor at some randomly chosen point
• randomPoints(...,DimensionFunction=>...) -- see randomPoints -- a function to find random points in a variety.