2004/11/20 | Klein方程[Klein's Equation]
类别(∑〖数学〗) | 评论(0) | 阅读(29) | 发表于 15:52
If a real algebraic curve has no singularities except nodes and cusps, bitangents, and inflection points, then

where n is the order, is the number of conjugate tangents, is the number of real inflections, m is the class, is the number of real conjugate points, and is the number of real cusps . This is also called Klein's theorem.
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