mob(M, x) M %mob% x
2-by-2 matrix of integers
vector of values to be transformed
Returns a value with the same attributes as
x. Elementwise, if
omitted: see PDF
mob(M,x) is (ax+b)/(cx+d).
This function does not check for
M being having integer
elements, nor for the determinant being unity.
Robin K. S. Hankin
Wikipedia contributors, "Mobius transformation," Wikipedia, The Free Encyclopedia (accessed February 13, 2011).
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