Results 111 to 120 of about 574 (169)
On the degree growth of iterated birational maps
, 2019 We construct a family of birational maps acting on two dimensional projective varieties, for which the growth of the degrees of the iterates is cubic. It is known that this growth can be bounded, linear, quadratic or exponential for such maps acting on two dimensional compact Kähler varieties.
openaire +2 more sources
Lie symmetries of birational maps preserving genus 0 fibrations
We prove that any planar birational integrable map, which preserves a fibration given by genus 0 curves has a Lie symmetry and some associated invariant measures.
Llorens, Mireia +1 more
core
Schubert cells and Whittaker functionals for GL ( r , R ) part I: Combinatorics. [PDF]
Manuscr MathKim D.
europepmc +1 more source
On birational maps from cubic threefolds
, 2015 We characterise smooth curves in a smooth cubic threefold whose blow-ups produce a weak-Fano threefold. These are curves C of genus g and degree d, such that (i) 2(d −5) ≤ g and d ≤ 6; (ii) C does not admit a 3-secant line in the cubic threefold.
Blanc, Jérémy, Lamy, Stéphane
core
Counterexamples to the MMP for 1-foliations in positive characteristic. [PDF]
Ann Univ Ferrara Sez 7 Sci MatBernasconi F.
europepmc +1 more source
Automorphism Groups of Deformations and Quantizations of Kleinian Singularities. [PDF]
Transform GroupsCastellan S.
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Geometry of the Kahan discretizations of planar quadratic Hamiltonian systems. [PDF]
Proc Math Phys Eng Sci, 2019 Petrera M, Smirin J, Suris YB.
europepmc +1 more source
Splitting unramified Brauer classes by abelian torsors and the period-index problem. [PDF]
Math AnnHuybrechts D, Mattei D.
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On Hodge polynomials for nonalgebraic complex manifolds. [PDF]
Proc Natl Acad Sci U S AKatzarkov L +3 more
europepmc +1 more source