On Quadric Transformation
نویسندگان
چکیده
منابع مشابه
On Quadric Surfaces
We study the functional codes C2(X) defined on projective varieties X , in the case where X ⊂ P is a 1-degenerate quadric or a non-degenerate quadric (hyperbolic or elliptic). We find the minimum distance of these codes, the second weight, and the third weight. We also show the geometrical structure of the first weight and second weight codewords. One result states that the codes C2(X) defined ...
متن کاملOn Tangents to Quadric Surfaces
We study the variety of common tangents for up to four quadric surfaces in projective three-space, with particular regard to configurations of four quadrics admitting a continuum of common tangents. We formulate geometrical conditions in the projective space defined by all complex quadric surfaces which express the fact that several quadrics are tangent along a curve to one and the same quadric...
متن کاملQuadric splines
Surface rendering or point location on a surface can easier be accomplished in an implicit rather than parametric representation This observation has been the key motivation for developing piecewise algebraic splines In particular Dahmen and Guo used triangular segments of quadrics to build tangent plane continuous surfaces interpolating the vertices of a trian gular net with prescribed normals...
متن کاملQuadric Veronesean Caps
In [2], a characterization theorem for Veronesean caps in PG(N,K), with K a skewfield, is provided. This result extends the theorem for the finite case proved in [7]. Although the statement of this theorem is correct, the proof given in [2] is incomplete, as some lemmas from [7] are proved using counting arguments and hence require a different approach in the infinite case. In this paper we use...
متن کاملCharacteristic Classes and Quadric Bundles
In this paper we construct Stiefel-Whitney and Euler classes in Chow cohomology for algebraic vector bundles with nondegenerate quadratic form. These classes are not in the algebra generated by the Chern classes of such bundles and are new characteristic classes in algebraic geometry. On complex varieties, they correspond to classes with the same name pulled back from the cohomology of the clas...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the London Mathematical Society
سال: 1884
ISSN: 0024-6115
DOI: 10.1112/plms/s1-16.1.148