ترغب بنشر مسار تعليمي؟ اضغط هنا

Limiting Distributions of Translates of Divergent Diagonal Orbits

249   0   0.0 ( 0 )
 نشر من قبل Cheng Zheng
 تاريخ النشر 2017
  مجال البحث
والبحث باللغة English




اسأل ChatGPT حول البحث

We define a natural topology on the collection of (equivalence classes up to scaling of) locally finite measures on a homogeneous space and prove that in this topology, pushforwards of certain infinite volume orbits equidistribute in the ambient space. As an application of our results we prove an asymptotic formula for the number of integral points in a ball on some varieties as the radius goes to infinity.



قيم البحث

اقرأ أيضاً

123 - Ofir David , Uri Shapira 2017
We consider divergent orbits of the group of diagonal matrices in the space of lattices in Euclidean space. We define two natural numerical invariants of such orbits: The discriminant - an integer - and the type - an integer vector. We then study the question of the limit distributional behaviour of these orbits as the discriminant goes to infinity. Using entropy methods we prove that for divergent orbits of a specific type, virtually any sequence of orbits equidistribute as the discriminant goes to infinity. Using measure rigidity for higher rank diagonal actions we complement this result and show that in dimension 3 or higher only very few of these divergent orbits can spend all of their life-span in a given compact set before they diverge.
75 - Uri Shapira , Cheng Zheng 2021
We prove that certain sequences of periodic orbits of the diagonal group in the space of lattices equidistribute. As an application we obtain new information regarding the sequence of best approximations to certain vectors with algebraic coordinates. In order to prove these results we generalize the seminal work of Eskin Mozes and Shah about the equidistribution of translates of periodic measures from the real case to the S-arithmetic case.
168 - Ruxi Shi , Masaki Tsukamoto 2021
When a finite group freely acts on a topological space, we can define its index and coindex. They roughly measure the size of the given action. We explore the interaction between this index theory and topological dynamics. Given a fixed-point free dy namical system, the set of $p$-periodic points admits a natural free action of $mathbb{Z}/pmathbb{Z}$ for each prime number $p$. We are interested in the growth of its index and coindex as $pto infty$. Our main result shows that there exists a fixed-point free dynamical system having the divergent coindex sequence. This solves a problem posed by [TTY20].
153 - Yejiong Zhu , Hao Chen 2021
Two-sample tests utilizing a similarity graph on observations are useful for high-dimensional data and non-Euclidean data due to their flexibility and good performance under a wide range of alternatives. Existing works mainly focused on sparse graphs , such as graphs with the number of edges in the order of the number of observations. However, the tests have better performance with denser graphs under many settings. In this work, we establish the theoretical ground for graph-based tests with graphs that are much denser than those in existing works.
التعليقات
جاري جلب التعليقات جاري جلب التعليقات
سجل دخول لتتمكن من متابعة معايير البحث التي قمت باختيارها
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا