狂怒
发表于 2025-3-30 12:16:25
Vector Spaces,symbols to denote certain sets. For instance we denote by . the set of all numbers. To say that “x is a number” or that “x is an element of .. amounts to the same thing. The set of n-tuples of numbers will be denoted by . Thus . is an element of .. and . is an n-tuple“ mean the same thing. Instead o
沉着
发表于 2025-3-30 14:42:25
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莎草
发表于 2025-3-30 17:00:51
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