Effective Localization Using Double Ideal Quotient and Its Implementation

In this paper, we propose a new method for localization of polynomial ideal, which we call “Local Primary Algorithm”. For an ideal $I$ and a prime ideal $P$, our method computes a $P$-primary component of $I$ after checking if $P$ is associated with $I$ by using “double ideal quotient” $(I:(I:P))$ and its variants which give us a lot of information about localization of $I$.