#let toc = ((
	title: [向量空间],
	sections: ([$RR^n$ 和 $CC^n$], [向量空间的定义], [子空间]),
), (
	title: [有限维向量空间],
	sections: ([张成空间和线性无关性], [基], [维数]),
), (
	title: [线性映射],
	sections: ([线性映射的向量空间], [零空间和值域], [矩阵],),
))