Results 131 to 140 of about 91,366 (255)

Hypersurface model-fields of definition for smooth hypersurfaces and their twists [PDF]

open access: yesarXiv, 2018
Given a smooth projective variety of dimension $n-1\geq 1$ defined over a perfect field $k$ that admits a non-singular hypersurface modelin $\mathbb{P}^n_{\overline{k}}$ over $\overline{k}$, a fixed algebraic closure of $k$, it does not necessarily have a non-singular hypersurface model defined over the base field $k$.
arxiv  

Curvatures of the Factorable Hypersurface

open access: yesJournal of Advances in Mathematics and Computer Science, 2020
The curvatures    of a factorable hypersurface are introduced in the four-dimensional Euclidean space. It is also given some relations on  of the factorable hypersurface.
openaire   +4 more sources

Some Integral Formulas for the (r + 1)th Mean Curvature of a Closed Hypersurface

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2012
By using the operator 𝐿𝑟, we define the notions of rth order and rth type of a Euclidean hypersurface. By the use of these notions, we are able to obtain some sharp estimates of the (𝑟+1)th mean curvature for a closed hypersurface of the Euclidean space ...
Akram Mohammadpouri, S. M. B. Kashani
doaj   +1 more source

Closed points on cubic hypersurfaces [PDF]

open access: yesarXiv, 2019
We generalize some results of Coray on closed points on cubic hypersurfaces. We show certain symmetric products of cubic hypersurfaces are stably birational.
arxiv  

Hypersurfaces and the Weil Conjectures [PDF]

open access: yesInternational Mathematics Research Notices, 2010
We give a proof that the Riemann hypothesis for hypersurfaces over finite fields implies the result for all smooth proper varieties, by a deformation argument which does not use the theory of Lefschetz pencils or the l-adic Fourier transform.
openaire   +3 more sources

Fano varieties and linear sections of hypersurfaces [PDF]

open access: yesarXiv, 2006
Under a hypothesis on $k$, $d$ and $n$ that is almost the best possible, we prove that for every smooth degree $d$ hypersurface in $P^n$, the $k$-plane sections dominate the moduli space of degree $d$ hypersurface in $P^k$. Using this we prove rational simple connectedness of every smooth degree $d$ hypersurface in $P^n$, under a suitable hypothesis ...
arxiv  

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