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8

Part of 1964 Miklós Schweitzer

Problems(1)

Miklos Schweitzer 1964_8

Source:

9/20/2008
Let F F be a closed set in the n n-dimensional Euclidean space. Construct a function that is 0 0 on F F, positive outside F F , and whose partial derivatives all exist.
functioncalculusderivativetopologyreal analysisreal analysis unsolved