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Counting Rational Points on Low-Degree del Pezzo Surfaces With Automorphic Forms
Counting Rational Points on Low-Degree del Pezzo Surfaces With Automorphic Forms
Counting Rational Points on Low-Degree del Pezzo Surfaces With Automorphic Forms

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202103518
ISBN  
9798280751156
DDC  
510
저자명  
Woo, Katharine.
서명/저자  
Counting Rational Points on Low-Degree del Pezzo Surfaces With Automorphic Forms
발행사항  
[Sl] : Princeton University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
211 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
주기사항  
Advisor: Sarnak, Peter.
학위논문주기  
Thesis (Ph.D.)--Princeton University, 2025.
초록/해제  
요약We study Manin's conjecture for certain families of low-degree del Pezzo surfaces, i.e. asymptotics for the number of rational points of increasing height. In general, problems about rational points on del Pezzo surfaces are considered harder as the degree gets lower. In this thesis, we resolve Manin's conjecture for all Chatelet surfaces over Q, which are del Pezzo surfaces of degree four, and establish the first asymptotic count for a set of rational points on a del Pezzo surface of degree one.In Chapter 2, we prove the key analytic ingredient necessary in both arguments - a bound on the sums of the absolute values of the Hecke eigenvalues of cuspidal automorphic forms of GL2(AQ) along polynomial values. We use pieces of the Sato-Tate distribution to prove a logarithmic power savings over the trivial bound in the applicable cases; additionally we classify, when the polynomial is solvable, exactly when a logarithmic power savings occurs using analysis about the base change of the cuspidal representation.In Chapter 3, we study Manin's conjecture for Chatelet surfaces - the proper smooth models of the affine surfaces x2 +∆y2 = f(z), where f(z) is a squarefree polynomial of degree 3 or 4. Previous works handle the case of ∆ = 1 (and extend to any ∆ 0 such that Q( √ −∆) has class number one). We resolve the conjecture by viewing the point-count through an automorphic lens and connecting it to the sums of Chapter 2.In Chapter 4, we study rational points on the singular del Pezzo surface of degree one defined by y2 = x3 +AxQ(u, v)2 +BQ(u, v)3, where 4A3 −27B2 ≠ 0 and Q(u, v) is a positive-definite quadratic form. The main algebraic tool used is a parameterization of the integral points on quadratic twists of elliptic curves by binary quartic forms; this parameterization was first observed by Mordell and uses syzygys of binary quartic forms. We then reduce the problem to correlation sums of binary quadratic and binary quartic forms, which are analyzed using the central analytic ingredients of Chapters 2 and 3. As a result, we establish an asymptotic count for rational points that are integral with respect to the singularity on these del Pezzo surfaces.
일반주제명  
Mathematics
일반주제명  
Theoretical mathematics
일반주제명  
Applied mathematics
키워드  
Automorphic forms
키워드  
Binary quadratic forms
키워드  
Manin's conjecture
키워드  
Rational points
기타저자  
Princeton University Mathematics
기본자료저록  
Dissertations Abstracts International. 86-12B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aWoo,  Katharine.
■24510▼aCounting  Rational  Points  on  Low-Degree  del  Pezzo  Surfaces  With  Automorphic  Forms
■260    ▼a[Sl]▼bPrinceton  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a211  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-12,  Section:  B.
■500    ▼aAdvisor:  Sarnak,  Peter.
■5021  ▼aThesis  (Ph.D.)--Princeton  University,  2025.
■520    ▼aWe  study  Manin's  conjecture  for  certain  families  of  low-degree  del  Pezzo  surfaces,  i.e.  asymptotics  for  the  number  of  rational  points  of  increasing  height.  In  general,  problems  about  rational  points  on  del  Pezzo  surfaces  are  considered  harder  as  the  degree  gets  lower.  In  this  thesis,  we  resolve  Manin's  conjecture  for  all  Chatelet  surfaces  over  Q,  which  are  del  Pezzo  surfaces  of  degree  four,  and  establish  the  first  asymptotic  count  for  a  set  of  rational  points  on  a  del  Pezzo  surface  of  degree  one.In  Chapter  2,  we  prove  the  key  analytic  ingredient  necessary  in  both  arguments  -  a  bound  on  the  sums  of  the  absolute  values  of  the  Hecke  eigenvalues  of  cuspidal  automorphic  forms  of  GL2(AQ)  along  polynomial  values.  We  use  pieces  of  the  Sato-Tate  distribution  to  prove  a  logarithmic  power  savings  over  the  trivial  bound  in  the  applicable  cases;  additionally  we  classify,  when  the  polynomial  is  solvable,  exactly  when  a  logarithmic  power  savings  occurs  using  analysis  about  the  base  change  of  the  cuspidal  representation.In  Chapter  3,  we  study  Manin's  conjecture  for  Chatelet  surfaces  -  the  proper  smooth  models  of  the  affine  surfaces  x2  +∆y2  =  f(z),  where  f(z)  is  a  squarefree  polynomial  of  degree  3  or  4.  Previous  works  handle  the  case  of  ∆  =  1  (and  extend  to  any  ∆    0  such  that  Q(  √  −∆)  has  class  number  one).  We  resolve  the  conjecture  by  viewing  the  point-count  through  an  automorphic  lens  and  connecting  it  to  the  sums  of  Chapter  2.In  Chapter  4,  we  study  rational  points  on  the  singular  del  Pezzo  surface  of  degree  one  defined  by  y2  =  x3  +AxQ(u,  v)2  +BQ(u,  v)3,  where  4A3  −27B2  ≠  0  and  Q(u,  v)  is  a  positive-definite  quadratic  form.  The  main  algebraic  tool  used  is  a  parameterization  of  the  integral  points  on  quadratic  twists  of  elliptic  curves  by  binary  quartic  forms;  this  parameterization  was  first  observed  by  Mordell  and  uses  syzygys  of  binary  quartic  forms.  We  then  reduce  the  problem  to  correlation  sums  of  binary  quadratic  and  binary  quartic  forms,  which  are  analyzed  using  the  central  analytic  ingredients  of  Chapters  2  and  3.  As  a  result,  we  establish  an  asymptotic  count  for  rational  points  that  are  integral  with  respect  to  the  singularity  on  these  del  Pezzo  surfaces. 
■590    ▼aSchool  code:  0181.
■650  4▼aMathematics
■650  4▼aTheoretical  mathematics
■650  4▼aApplied  mathematics
■653    ▼aAutomorphic  forms
■653    ▼aBinary  quadratic  forms
■653    ▼aManin's  conjecture
■653    ▼aRational  points
■690    ▼a0405
■690    ▼a0642
■690    ▼a0364
■71020▼aPrinceton  University▼bMathematics.
■7730  ▼tDissertations  Abstracts  International▼g86-12B.
■790    ▼a0181
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357481▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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