束 (射影幾何学)
1. Pencil (mathematics)A pencil in projective geometry is a family of geometric objects with a common property, for example the set of lines that pass through a given point in a projective plane. More generally, a pencil is the special case of a linear system of divisors in which the parameter space is a projective line. Typical pencils of curves in the projective plane, for example, are written as λC + μC′ = 0 where C = 0, C′ = 0 are plane curves.
Read “Pencil (mathematics)” on English Wikipedia
Read “束 (射影幾何学)” on Japanese Wikipedia
Read “Pencil (mathematics)” on DBpedia
Read “Pencil (mathematics)” on English Wikipedia
Read “束 (射影幾何学)” on Japanese Wikipedia
Read “Pencil (mathematics)” on DBpedia
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