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双曲面
1. hyperboloidMathematics
2. HyperboloidIn mathematics, a hyperboloid is a quadric – a type of surface in three dimensions – described by the equation (hyperboloid of one sheet), or (hyperboloid of two sheets). These are also called elliptical hyperboloids. If and only if a = b, it is a hyperboloid of revolution, and is also called a circular hyperboloid.
Read “Hyperboloid” on English Wikipedia
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Read “Hyperboloid” on DBpedia
Read “Hyperboloid” on English Wikipedia
Read “双曲面” on Japanese Wikipedia
Read “Hyperboloid” on DBpedia
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