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Extractors for Additive Structures and Space-bounded Computation
Extractors for Additive Structures and Space-bounded Computation
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151331
- ISBN
- 9798382841045
- DDC
- 004
- 저자명
- Liao, Jyun-Jie.
- 서명/저자
- Extractors for Additive Structures and Space-bounded Computation
- 발행사항
- [Sl] : Cornell University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 223 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-12, Section: B.
- 주기사항
- Advisor: Chattopadhyay, Eshan.
- 학위논문주기
- Thesis (Ph.D.)--Cornell University, 2024.
- 초록/해제
- 요약Randomness is a powerful resource in computer science, with rich applications in algorithm design, cryptography, distributed computing, etc. Most of the applications assume access to a sequence of uniform and independent random bits. However, the randomness we collect from nature (e.g., activity of CPU, atmospheric noise, radioactive decay) does not seem as perfect. This motivates the study of randomness extractors, which are deterministic algorithms that can convert an imperfect random source (with some entropy) into a uniform random string. The ultimate goal in the area of randomness extraction is to construct an extractor that can work for any source that we would ever see in nature and applications. Unfortunately, a folklore result shows that it is impossible to construct an extractor that can work for every source that has entropy. It is therefore necessary to assume that the given source has certain structure, but we still hope that the structure we assume is as general as possible. In this thesis, we first focus on the construction of randomness extractors for sources with additive structure. This includes affine sources, which are uniform distributions over affine subspaces; and more generally the sum of two independent sources, which is a surprisingly general model that contains many other natural sources such as independent sources, affine sources and sources samplable by space-bounded computation. For both models, we construct extractors that improve the previous state-of-the-art, and develop many useful tools along the way. In addition, we discover new connections between sources with additive structure and space-bounded computation, and as a result we obtain extractors for small-space sources with optimal entropy requirement, and a new lower bound for linear branching programs. Finally, we develop more results regarding randomness and space-bounded computation, including new weighted pseudorandom generators and derandomization bounds for small-space algorithms.
- 일반주제명
- Computer science
- 일반주제명
- Computer engineering
- 일반주제명
- Applied mathematics
- 키워드
- Derandomization
- 기타저자
- Cornell University Computer Science
- 기본자료저록
- Dissertations Abstracts International. 85-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211151331
■006m o d
■007cr#unu||||||||
■020 ▼a9798382841045
■035 ▼a(MiAaPQ)AAI31241126
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a004
■1001 ▼aLiao, Jyun-Jie.▼0(orcid)0000-0003-3332-1460
■24510▼aExtractors for Additive Structures and Space-bounded Computation
■260 ▼a[Sl]▼bCornell University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a223 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-12, Section: B.
■500 ▼aAdvisor: Chattopadhyay, Eshan.
■5021 ▼aThesis (Ph.D.)--Cornell University, 2024.
■520 ▼aRandomness is a powerful resource in computer science, with rich applications in algorithm design, cryptography, distributed computing, etc. Most of the applications assume access to a sequence of uniform and independent random bits. However, the randomness we collect from nature (e.g., activity of CPU, atmospheric noise, radioactive decay) does not seem as perfect. This motivates the study of randomness extractors, which are deterministic algorithms that can convert an imperfect random source (with some entropy) into a uniform random string. The ultimate goal in the area of randomness extraction is to construct an extractor that can work for any source that we would ever see in nature and applications. Unfortunately, a folklore result shows that it is impossible to construct an extractor that can work for every source that has entropy. It is therefore necessary to assume that the given source has certain structure, but we still hope that the structure we assume is as general as possible. In this thesis, we first focus on the construction of randomness extractors for sources with additive structure. This includes affine sources, which are uniform distributions over affine subspaces; and more generally the sum of two independent sources, which is a surprisingly general model that contains many other natural sources such as independent sources, affine sources and sources samplable by space-bounded computation. For both models, we construct extractors that improve the previous state-of-the-art, and develop many useful tools along the way. In addition, we discover new connections between sources with additive structure and space-bounded computation, and as a result we obtain extractors for small-space sources with optimal entropy requirement, and a new lower bound for linear branching programs. Finally, we develop more results regarding randomness and space-bounded computation, including new weighted pseudorandom generators and derandomization bounds for small-space algorithms.
■590 ▼aSchool code: 0058.
■650 4▼aComputer science
■650 4▼aComputer engineering
■650 4▼aApplied mathematics
■653 ▼aDerandomization
■653 ▼aPseudorandom generator
■653 ▼aRandomness extractor
■653 ▼aSpace-bounded computation
■653 ▼aSumset extractors
■690 ▼a0984
■690 ▼a0464
■690 ▼a0364
■71020▼aCornell University▼bComputer Science.
■7730 ▼tDissertations Abstracts International▼g85-12B.
■790 ▼a0058
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161263▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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