Möller’s Algorithm is a procedure which, given a set of linear functionals defining a zero-dimensional polynomial ideal, allows to compute, with good complexity,
a set of polynomials which are triangular/bihortogonal to the given functionals;
at least a “minimal” polynomial which vanishes to all the given functionals;
a Gröbner basis of the given ideal.
As such Möller’s Algorithm has applications
when the functionals are point evaluation (where the only relevant informations are the bihortogonal polynomials);
as an interpretation of Berlekamp–Massey Algorithm (such interpretation is due to Fitzpatrick) where the deduced minimal vanishing polynomial is the key equation;
as an efficient solution of the FGLM-Problem (deduced with good complexity the lex Gröbner basis of a zero-dim. ideal given by another easy-to-be-computed Gröbner basis of the same ideal).