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非齐次线性方程组 引出线性流形 陪集 阅读全文
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小结: 1、数域、环、半环 :一般化、泛化 https://en.wikipedia.org/wiki/Matrix_multiplication In mathematics, matrix multiplication or matrix product is a binary operatio 阅读全文
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0.2.2 Linear transformations. Let U be an n-dimensional vector space and let V be an m-dimensional vector space, both over the same field F; let BU be 阅读全文
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小结: 1、两个有限维度的向量空间,在同一数域下,是同构的 等价于 它们维数相等。 Isomorphism 同构 0.1.8 Isomorphism. If U and V are vector spaces over the same scalar field F, and if f : U → 阅读全文
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小结: 1、xy平面 与 直和 https://en.wikipedia.org/wiki/Direct_sum For example, the xy-plane, a two-dimensional vector space, can be thought of as the direct su 阅读全文
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Mean reversion (finance) 均值回归 阅读全文
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采购优化 博弈 价格 采购量 阅读全文