| 单词 | Kronecker delta | 
| 释义 | Word Frequency Kronecker delta(ˈkrɒnɪkə) noun  mathematics a function of two variables, i and j, that has a value of zero unless i = j, when it has a value of unity   Symbol: δ ijWord origin named after Leopold Kronecker (1823–91), German mathematician | 
	
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