Kronecker delta The two variable function δij that takes the value 1 when i = j and the value 0 otherwise. δij is the row i, column j entry of an identity matrix. See sifting property.
Kronecker delta
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。