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High Dimensional Expanders in Analysis and Computation
High Dimensional Expanders in Analysis and Computation
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151946
- ISBN
- 9798383243923
- DDC
- 004
- 서명/저자
- High Dimensional Expanders in Analysis and Computation
- 발행사항
- [Sl] : University of California, San Diego, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 820 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
- 주기사항
- Advisor: Kane, Daniel;Lovett, Shachar.
- 학위논문주기
- Thesis (Ph.D.)--University of California, San Diego, 2024.
- 초록/해제
- 요약High dimensional expanders (HDX) are a nascent generalization of expander graphs (sparse yet robustly connected networks that play a core role in the theory of computation) to high dimensional domains. Despite recent breakthrough use in sampling and local testability, relatively little is known about HDX, their properties, and their broader position in theoretical computer science. In this dissertation, we develop the role of high dimensional expanders in computation through the interplay of Boolean analysis, concentration of measure, approximation algorithms, and hardness of approximation.In the first half of this dissertation, we develop a robust theory of Fourier and probabilistic analysis on HDX. This includes generalizations of standard tools of theoretical computer science such as the Fourier decomposition, hypercontractivity, and Chernoff bounds, as well as more application-focused techniques such as symmetrization, reverse hypercontractivity, and concentration of high degree functions. In many cases, our results give the first sparse domains satisfying such notions, a critical consideration in application where density or 'degree' controls the cost associated with their use.In the second half of this dissertation, we give applications of these ideas to algorithms, complexity, and mathematics. Algorithmically, we show the local structure of high dimensional expanders can be exploited to build fast approximation algorithms for unique games, and explore implications of fast approximate sampling algorithms on HDX to massive multiplayer matrix games. In mathematics, we show high dimensional expanders have optimal geometric overlap, extend a variant of the Frankl-Rodl theorem to HDX, and prove new degree lower bounds for certain HDX. Finally in complexity we leverage new topological HDX to construct optimally hard explicit constraint satisfaction problems for Sum-of-Squares (a powerful optimization paradigm), and prove spectral HDX satisfy an optimal (local) agreement testing theorem and an optimal global tester under stronger ℓ∞-type assumptions, a stepping stone towards improved low-soundness probabilistically checkable proofs and hardness of approximation.
- 일반주제명
- Computer science
- 일반주제명
- Mathematics
- 키워드
- Boolean analysis
- 키워드
- Graphs
- 기타저자
- University of California, San Diego Computer Science and Engineering
- 기본자료저록
- Dissertations Abstracts International. 86-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151946
■006m o d
■007cr#unu||||||||
■020 ▼a9798383243923
■035 ▼a(MiAaPQ)AAI31327738
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a004
■1001 ▼aHopkins, Nathaniel Max Klevit.
■24510▼aHigh Dimensional Expanders in Analysis and Computation
■260 ▼a[Sl]▼bUniversity of California, San Diego▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a820 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-01, Section: B.
■500 ▼aAdvisor: Kane, Daniel;Lovett, Shachar.
■5021 ▼aThesis (Ph.D.)--University of California, San Diego, 2024.
■520 ▼aHigh dimensional expanders (HDX) are a nascent generalization of expander graphs (sparse yet robustly connected networks that play a core role in the theory of computation) to high dimensional domains. Despite recent breakthrough use in sampling and local testability, relatively little is known about HDX, their properties, and their broader position in theoretical computer science. In this dissertation, we develop the role of high dimensional expanders in computation through the interplay of Boolean analysis, concentration of measure, approximation algorithms, and hardness of approximation.In the first half of this dissertation, we develop a robust theory of Fourier and probabilistic analysis on HDX. This includes generalizations of standard tools of theoretical computer science such as the Fourier decomposition, hypercontractivity, and Chernoff bounds, as well as more application-focused techniques such as symmetrization, reverse hypercontractivity, and concentration of high degree functions. In many cases, our results give the first sparse domains satisfying such notions, a critical consideration in application where density or 'degree' controls the cost associated with their use.In the second half of this dissertation, we give applications of these ideas to algorithms, complexity, and mathematics. Algorithmically, we show the local structure of high dimensional expanders can be exploited to build fast approximation algorithms for unique games, and explore implications of fast approximate sampling algorithms on HDX to massive multiplayer matrix games. In mathematics, we show high dimensional expanders have optimal geometric overlap, extend a variant of the Frankl-Rodl theorem to HDX, and prove new degree lower bounds for certain HDX. Finally in complexity we leverage new topological HDX to construct optimally hard explicit constraint satisfaction problems for Sum-of-Squares (a powerful optimization paradigm), and prove spectral HDX satisfy an optimal (local) agreement testing theorem and an optimal global tester under stronger ℓ∞-type assumptions, a stepping stone towards improved low-soundness probabilistically checkable proofs and hardness of approximation.
■590 ▼aSchool code: 0033.
■650 4▼aComputer science
■650 4▼aMathematics
■653 ▼aHigh dimensional expanders
■653 ▼aBoolean analysis
■653 ▼aApproximation algorithms
■653 ▼aGraphs
■690 ▼a0984
■690 ▼a0405
■71020▼aUniversity of California, San Diego▼bComputer Science and Engineering.
■7730 ▼tDissertations Abstracts International▼g86-01B.
■790 ▼a0033
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162213▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


