On continuity of Guo Wuwen function
| Autor: | Zofia Ambroży, Iwo Biborski |
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| Rok vydání: | 2014 |
| Předmět: |
Discrete mathematics
(2010) 15A18 15A29 Numerical Analysis Algebra and Number Theory Closed set Function (mathematics) Set (abstract data type) Mathematics - Algebraic Geometry FOS: Mathematics Discrete Mathematics and Combinatorics Geometry and Topology Tuple Algebraic Geometry (math.AG) Mathematics Real number |
| DOI: | 10.48550/arxiv.1406.4744 |
| Popis: | We show that the functions g and g s introduced by Guo Wuwen in [4] are continuous and semialgebraic. We use this fact to prove that the set N n of ordered n -tuples of real numbers, realizable by nonnegative matrices, is a closed set. |
| Databáze: | OpenAIRE |
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