单词	boundary operation
释义	boundary operation 边缘运算
随便看	sigma-field sigma-field of events sigma-field of sets sigma-field prior to τ sigma-field strictly prior to τ sigma-finite sigma-finite measure sigma-finite measure space sigma-function sigma-group sigma-ideal sigma-locally finite family sigma-polynomial sigma-process sigma-regular subalgebra sigma-ring sigma-space sigma-topology sigma-weak topology sigmoid sigmoid curve sigmoid distribution sigmoid function sigmoid-shaped curve sign

数学辞典收录了72750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。