In some cases they are also optimal. Then we show that very few connected algebraic semigroups can be realized as endomorphisms of some projective variety X, by describing the structure of all connected subsemigroup schemes of End(X). PDF Finite linear spaces admitting a projective group PSU 3,q)with q ... - CORE Automorphisms of The Symmetric and Alternating Groups Link to IRIS PubliCatt. This article is a contribution to the study of linear spaces admitting a line-transitive automorphism group. With the obvious traditional abuse of notation we just write this as the Möbius transformation. PDF A brief introduction to automorphisms of algebraic varieties. Talca ... To any cubic surface, one can associate a cubic threefold given by a triple cover of P3P3 branched in this cubic surface. Linear codes with large automorphism groups are constructed. 0) I'll use coordinates (t: z) on the projective line P 1 (C), with the embedding C . 5 where b k(X) denote the Betti numbers of X.In characteristic p>0, this is not true anymore, it could happen that ˆ(X) = b 2(X) (defined in terms of the l-adic cohomology) even when p g>0. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): We introduce a notion of super-potential for positive closed currents of bidegree (p,p) on projective spaces. We classify such linear spaces where PSL(2,q), q>3 acts line transitively.We prove that the only cases which arise are projective planes, a Bose-Witt-Shrikhande linear space and one more space admitting PSL(2,2 6) as a line-transitive automorphism group. We also have the Hodge decomposition H1(X;C) = H1;0(X) H0;1(X): The Hodge number h1;0 = h0;1 is denoted by q(X) and is called the irregularity of X. Ii p= 0, it is equal to the dimension of the Albanese . f ( z) = α z + β γ z + δ. 171 9. Together they form a unique fingerprint. neutral component of the automorphism group scheme of some normal pro-jective variety. Any automorphism of \mathbb P^1 - \{0,1,\infty\} will extend to an automorphism of \mathbb P^1 fixing Internet Archive Search: subject:"automorphism" automorphism group is finite (see [21] and [42], and also [14]), and . D. Allcock, J. Carlson, and D. Toledo used this construction to define the period map for cubic surfaces. 10.1515/advgeom-2020-0027. Answer. CiteSeerX — An upper bound for the height for regular affine ...

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