Foundations of Matroids:
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Bibliographische Detailangaben
Beteiligte Personen: Baker, Matthew 1973- (VerfasserIn), Lorscheid, Oliver 1978- (VerfasserIn)
Format: Buch
Sprache:Englisch
Veröffentlicht: Providence American Mathematical Society 2025-
Ausgabe:Pt. 1.2025-
Schriftenreihe:Memoirs of the American Mathematical Society Series ...
Abstract:Cover -- Title page -- Introduction -- A quick introduction to pastures -- Representations of matroids over pastures and the foundation of a matroid -- Products and coproducts -- Universal cross ratios -- The structure theorem for foundations of matroids without large uniform minors -- Consequences of the structure theorem -- Content overview -- Acknowledgments -- Chapter 1. Background -- 1.1. Notation -- 1.2. The Tutte group -- 1.3. Embedded minors -- Chapter 2. Pastures -- 2.1. Definition and first properties -- 2.2. Matroid representations -- 2.3. Matroid representations via hyperplane functions -- 2.4. The universal pasture -- 2.5. The Tutte group and the universal pasture -- Chapter 3. Cross ratios -- 3.1. Cross ratios of -matroids -- 3.2. Cross ratios for hyperplanes -- 3.3. Universal cross ratios -- 3.4. Fundamental elements -- 3.5. Compatibility with the Tutte group formulation of Dress and Wenzel -- Chapter 4. Foundations -- 4.1. Definition and basic facts -- 4.2. Universal cross ratios as generators of the foundation -- 4.3. The foundation of the dual matroid -- 4.4. Foundations of embedded minors -- 4.5. The foundation of ²₄ -- 4.6. The tip and cotip relations -- 4.7. Relations for parallel elements -- 4.8. The foundation of the Fano matroid and its dual -- 4.9. A presentation of the foundation by hyperplanes -- 4.10. A presentation of the foundation by bases -- 4.11. A presentation of the foundation by embedded minors -- Chapter 5. The structure theorem -- 5.1. Foundations of matroids on 5 elements -- 5.2. Symmetry quotients -- 5.3. The structure theorem for matroids without large uniform minors -- Chapter 6. Applications -- 6.1. Forbidden minors for regular, binary and ternary matroids -- 6.2. Uniqueness of the rescaling class over F₃ -- 6.3. Criteria for representability over certain fields.
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