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Results tagged with big-list
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user 7333
Questions designed to generate a "big list" of certain results, examples, conjectures, etc. via many individual answers, each contributing one or a few instances. Such a question should typically be in Community Wiki mode (CW); after asking, please, flag for moderators attention requesting the question to be made CW.
7
votes
Counterexamples in PDE
Lewy's example and most other allied examples of non-solvable operators have only complex coefficients. Leaving open the question of unsolvable operators with real coefficient. F.Treves in 1962 has co …
5
votes
5
answers
3k
views
Easy and Hard problems in Mathematics [closed]
Modified question:
I would like to know some examples of problems in Mathematics, for pedagogical purposes, which do not involve difficult techiques to solve the problem but with a change of context …
8
votes
Excellent uses of induction and recursion
1)Proof of Euler's formula, V-E+F=2, with induction on F (number of faces).
2)Backward induction proof of generalized AM-GM inequality.
3)Proof of Heine-Borel theorem using Transfinite Topological …
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