what is the origin of orthogonal discomposition?

what is the origin of orthogonal discomposition?
what is the origin of orthogonal discomposition?

what is the origin of orthogonal discomposition?
为你的翻译如下：
orthogonal discomposition 是正交分解法,
因此原句的意思是,
正交分解法的起源是什么?

什么事矩形的分解的原理？？