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Writing on paper notebook
2018读书列表
如何面对“烂代码”
预备刻意练习
Theorem 19.6 in James Munkres Topology
A tuple is defined as a function
Different ways of constructing continuous functions
Exercise 12 in Section 18 of James Munkres Topology
Understanding of continuity definition in topology
Theorem 16.3 in James Munkres Topology