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This is an incomplete article on
Hadamard spaces and their compactications: Busemann functions are the main device for identifying the boundary (e.g. the
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This article reads like an advanced mathematics textbook. However, Knowledge is an encyclopedia for a general audience, not a textbook. Please see
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tried to improve the formulas at the first example still don't understand a lot if it would welcome further improvements
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thanks, corrected. this was badly formulated, i also added some precisions.
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