Computations in Commutative algebra (CoCoA) is another free computer algebra system for working with very large integers, rational Numbers, and polynomials.
Computations in Commutative Algebra (CoCoA)是另一个免费计算机代数系统，用于处理超大型整数、有理数和多项式。
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Write operations are idempotent and commutative, based on the time they enter the system.
The author evaluated the output voltage drop owing to the commutative process and armature reaction in detail by means of the analysis of the existent system and the dynamic simulation experiments.