单词	stars and bars
释义	stars and bars A counting technique in combinatorics, so named because of the notation used. For example: how many triples (x,y,z) of non-negative integers are there such that x+y+z = 100? Each such triple can be represented as (⋆∙∙∙⋆|⋆∙∙∙⋆|⋆∙∙∙⋆) where there are 100 stars, separated by 2 bars into x, then y, then z stars. So there are ways of choosing where to place the 2 bars, and so this number of triples. If we insist x,y,z are positive, then the answer is , as 3 of these choices have been made.
随便看	equivalence class equivalence relation equivalent equivalent norms equivariant map equi‐ Eratosthenes of Cyrene Erdős conjecture Erdős number Erdős, Paul erf ergodic ergodic theory ERO error error analysis error function error‐correcting escape speed e-science escribed circle essential singularity estimate estimation estimator

数学辞典收录了4151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。