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Triangulations of Oriented Matroids

Francisco Santos University of Cantabria, Santander, Spain
Available Formats:
Electronic ISBN: 978-1-4704-0334-8
Product Code: MEMO/156/741.E
List Price: $56.00 MAA Member Price:$50.40
AMS Member Price: $33.60 Click above image for expanded view Triangulations of Oriented Matroids Francisco Santos University of Cantabria, Santander, Spain Available Formats:  Electronic ISBN: 978-1-4704-0334-8 Product Code: MEMO/156/741.E  List Price:$56.00 MAA Member Price: $50.40 AMS Member Price:$33.60
• Book Details

Memoirs of the American Mathematical Society
Volume: 1562002; 80 pp
MSC: Primary 52;

We consider the concept of triangulation of an oriented matroid. We provide a definition which generalizes the previous ones by Billera–Munson and by Anderson and which specializes to the usual notion of triangulation (or simplicial fan) in the realizable case.

Then we study the relation existing between triangulations of an oriented matroid $\mathcal{M}$ and extensions of its dual $\mathcal{M}^*$, via the so-called lifting triangulations. We show that this duality behaves particularly well in the class of Lawrence matroid polytopes. In particular, that the extension space conjecture for realizable oriented matroids is equivalent to the restriction to Lawrence polytopes of the Generalized Baues problem for subdivisions of polytopes.

We finish by showing examples and a characterization of lifting triangulations.

Graduate students and research mathematicians interested in convex and discrete geometry.

• Chapters
• Introduction
• 1. Preliminaries on oriented matroids
• 2. Triangulations of oriented matroids
• 3. Duality between triangulations and extensions
• 4. Subdivisions of Lawrence polytopes
• 5. Lifting triangulations
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Review Copy – for reviewers who would like to review an AMS book
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Volume: 1562002; 80 pp
MSC: Primary 52;

We consider the concept of triangulation of an oriented matroid. We provide a definition which generalizes the previous ones by Billera–Munson and by Anderson and which specializes to the usual notion of triangulation (or simplicial fan) in the realizable case.

Then we study the relation existing between triangulations of an oriented matroid $\mathcal{M}$ and extensions of its dual $\mathcal{M}^*$, via the so-called lifting triangulations. We show that this duality behaves particularly well in the class of Lawrence matroid polytopes. In particular, that the extension space conjecture for realizable oriented matroids is equivalent to the restriction to Lawrence polytopes of the Generalized Baues problem for subdivisions of polytopes.

We finish by showing examples and a characterization of lifting triangulations.

Graduate students and research mathematicians interested in convex and discrete geometry.

• Chapters
• Introduction
• 1. Preliminaries on oriented matroids
• 2. Triangulations of oriented matroids
• 3. Duality between triangulations and extensions
• 4. Subdivisions of Lawrence polytopes
• 5. Lifting triangulations
Review Copy – for reviewers who would like to review an AMS book
Permission – for use of book, eBook, or Journal content
Accessibility – to request an alternate format of an AMS title
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