“DirectSummand”的概念、定义、习题解题方法及翻译-数学辞典

单词	DirectSummand
释义	direct summand Let $R$ be a ring and $B\\subseteq A$ left (right) $R$ -modules. Then $B$ is called a direct summand of $A$ if there exists a left (right) $R$ -submodule $C$ such that $A=B\\oplus C$ . For example, a projective module is a direct summand of a free module over any ring.
随便看	divisor function DivisorFunctionIsMultiplicativeThe divisor function is multiplicative, the DivisorsInBaseFieldAndFiniteExtensionField divisors in base field and finite extension field DivisorSumOfAnArithmeticFunction divisor sum of an arithmetic function DivisorTheory divisor theory DivisorTheoryAndExponentValuations divisor theory and exponent valuations DivisorTheoryInFiniteExtension divisor theory in finite extension DNAInequality DNA inequality DNF DNF Dodecagon dodecagon Dodecahedron dodecahedron Domain domain domain domain

数学辞典收录了18232条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。

direct summand