a bfunction b array a; poly b; a : [f] ; string f ; a : [f] ; polynomial f ; a : [f v] ; string f,v; a : [f v] ; polynomial f, string v; b is the b-function (=Bernstein-Sato polynomial) of a polynomial f in variables v. If v is not specified, the variables are assumed to be (x,y,z). b will be a polynomial in s. This variable can be changed by typing in (variable) /bfunction.s set For the algorithm, see Duke Math. J. 87 (1997),115-132, J. Pure and Applied Algebra 117&118(1997), 495--518. Example [(x^3-y^2) (x,y)] bfunction :: See also bfct which implements a new algorithm to compute b-function and is faster. Aug 2002.

Nobuki Takayama 2020-11-24