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Definition of the orthogonality of a function
在数学中,函数的正交性是用来描述一组函数具有的一种关键关系,这种关系意味着这组函数在某种意义上是互相独立的。
在函数空间中,两个函数
\(f_{i}(x),f_{j}(x)\)
被称为正交的,如果它们的内积为零:
\(\left\langle f_{i}(x),f_{j}(x)\right\rangle=0\)
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