com.perisic.ring - A Java package for multivariate polynomials over rings. A package of Java classes for multivariate and univariate polynomials over the rings: Z(integers), Q (rational numbers), R (real numbers), C (complex numbers), F_2 (field of two elements), Cyclotomic Number Fields, and more. Also supported are modular rings K[X]/f(X) for a ring K and a polynomial f and Quotient Fields over rings. There are also classes for implementing universal rings. The newest version features an universal cyclotomic field. Computer algebra system (CAS).