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- ....org/product/112-combinatorial-problems-from-amsp/.112 problems is a great discrete math book covering topics ranging from permutations and combinations to usi ===Topology===24 KB (3,198 words) - 19:44, 4 December 2024
- Every metric space can be used to form a topology by considering taking the set of open balls as a [[topological basis]] (i.e * For any set <math>S</math>, the [[discrete metric]] <math>d(x, y) = 0 \Longleftrightarrow x = y</math> and <math>d(x,1 KB (227 words) - 19:15, 13 October 2019
- In [[topology]], a space <math>X</math> is '''connected''' if it cannot be '''separated'' ...es of such a space include the [[discrete topology]] and the [[lower-limit topology]].3 KB (497 words) - 15:27, 15 March 2010
- ...y]]. It is formed by taking the [[Cartesian product]] of the [[lower-limit topology]] on <math>\mathbb{R}</math> with itself. ...a closed subspace of the Sorgenfrey plane, but it inherits the [[discrete topology]] as a subspace: consider the basis element given by <math>[x,x+1) \times [1 KB (205 words) - 10:20, 26 May 2019