We say a metric space complete if every Cauchy sequence converges.
Let (X, d) be a metric space. Show that there exists an isometric imbedding from X to a complete metric space Y so that the image of X in Y is dense.
The best solution was submitted by 김기수 (수리과학과 2018학번). Congratulations!
Here is his solution of problem 2020-05.
Other solutions were submitted by 고성훈 (수리과학과 2018학번, +3), 구은한 (수리과학과 2019학번, +3), 길현준 (수리과학과 2018학번, +3), 김기택 (수리과학과 2015학번, +3), 이준호 (2016학번, +3).
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Solution: 2020-05 Completion of a metric space,
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