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Long-Time Behavior of Systems of Fisher-KPP Type and Other Topics
Long-Time Behavior of Systems of Fisher-KPP Type and Other Topics
Long-Time Behavior of Systems of Fisher-KPP Type and Other Topics

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자료유형  
 학위논문 서양
최종처리일시  
20260202105610
ISBN  
9798265426734
DDC  
515
저자명  
Stavrianidi, Alexandra.
서명/저자  
Long-Time Behavior of Systems of Fisher-KPP Type and Other Topics
발행사항  
[Sl] : Stanford University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
213 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Ryzhik, Leonid.
학위논문주기  
Thesis (Ph.D.)--Stanford University, 2025.
초록/해제  
요약In this thesis, we describe results from three very different areas of mathematics. First, we present results on the long-time behavior of a cooperative system of nonlinear reaction-diffusion equations of Fisher-KPP type with interacting components, which can be associated with a multitype branching process. We determine the asymptotics of the location of the fronts and show that time-dependent solutions with initial data that are compact perturbations of a step function converge to the minimal speed traveling wave of the classic Fisher-KPP equation.In the second chapter, we apply Malliavin calculus to the stochastic heat equation in one dimension to obtain regularity results that let us provide a new proof for the existence of a density for the law of the solution.In the third chapter, we discuss physics-informed neural networks, which are neural networks that can simulate the solution to a PDE, and we propose an algorithm that improves their performance on extrapolation tasks, that is, predictions outside the temporal training domain.
일반주제명  
Calculus
일반주제명  
Growth models
일반주제명  
Partial differential equations
일반주제명  
Brownian motion
일반주제명  
Neural networks
일반주제명  
Population density
일반주제명  
Spacetime
일반주제명  
Stochastic models
일반주제명  
Biology
일반주제명  
Genes
일반주제명  
Mathematics
일반주제명  
Theoretical physics
기타저자  
Stanford University.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

 008260126s2025        us                              c    eng  d
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■006m          o    d                
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■020    ▼a9798265426734
■035    ▼a(MiAaPQ)AAI32316383
■035    ▼a(MiAaPQ)Stanforddm811kt6041
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a515
■1001  ▼aStavrianidi,  Alexandra.
■24510▼aLong-Time  Behavior  of  Systems  of  Fisher-KPP  Type  and  Other  Topics
■260    ▼a[Sl]▼bStanford  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a213  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Ryzhik,  Leonid.
■5021  ▼aThesis  (Ph.D.)--Stanford  University,  2025.
■520    ▼aIn  this  thesis,  we  describe  results  from  three  very  different  areas  of  mathematics.  First,  we  present  results  on  the  long-time  behavior  of  a  cooperative  system  of  nonlinear  reaction-diffusion  equations  of  Fisher-KPP  type  with  interacting  components,  which  can  be  associated  with  a  multitype  branching  process.  We  determine  the  asymptotics  of  the  location  of  the  fronts  and  show  that  time-dependent  solutions  with  initial  data  that  are  compact  perturbations  of  a  step  function  converge  to  the  minimal  speed  traveling  wave  of  the  classic  Fisher-KPP  equation.In  the  second  chapter,  we  apply  Malliavin  calculus  to  the  stochastic  heat  equation  in  one  dimension  to  obtain  regularity  results  that  let  us  provide  a  new  proof  for  the  existence  of  a  density  for  the  law  of  the  solution.In  the  third  chapter,  we  discuss  physics-informed  neural  networks,  which  are  neural  networks  that  can  simulate  the  solution  to  a  PDE,  and  we  propose  an  algorithm  that  improves  their  performance  on  extrapolation  tasks,  that  is,  predictions  outside  the  temporal  training  domain.
■590    ▼aSchool  code:  0212.
■650  4▼aCalculus
■650  4▼aGrowth  models
■650  4▼aPartial  differential  equations
■650  4▼aBrownian  motion
■650  4▼aNeural  networks
■650  4▼aPopulation  density
■650  4▼aSpacetime
■650  4▼aStochastic  models
■650  4▼aBiology
■650  4▼aGenes
■650  4▼aMathematics
■650  4▼aTheoretical  physics
■690    ▼a0306
■690    ▼a0800
■690    ▼a0405
■690    ▼a0753
■71020▼aStanford  University.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0212
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360717▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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