Diagrammatic Algebra by Chris Bowman

  • CategoryOther
  • TypeE-Books
  • LanguageEnglish
  • Total size6.7 MB
  • Uploaded Byfreecoursewb
  • Downloads39
  • Last checkedMay. 07th '25
  • Date uploadedMay. 07th '25
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Infohash : 8B74146072E7F63B989E28F9E503B0F4033146AD

Diagrammatic Algebra by Chris Bowman



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English | 2025 | ISBN: 3031888006 | 375 pages | PDF | 6.66 MB

Diagrammatic Algebra provides the intuition and tools necessary to address some of the key questions in modern representation theory, chief among them Lusztig’s conjecture. This book offers a largely self-contained introduction to diagrammatic algebra, culminating in an explicit and entirely diagrammatic treatment of Geordie Williamson’s explosive torsion counterexamples in full detail.

The book begins with an overview of group theory and representation theory: first encountering Coxeter groups through their actions on puzzles, necklaces, and Platonic solids; then building up to non-semisimple representations of Temperley–Lieb and zig-zag algebras; and finally constructing simple representations of binary Schur algebras using the language of coloured Pascal triangles. Next, Kazhdan–Lusztig polynomials are introduced, with their study motivated by their combinatorial properties. The discussion then turns to diagrammatic Hecke categories and their associated p-Kazhdan–Lusztig polynomials, explored in a hands-on manner with numerous examples. The book concludes by showing that the problem of determining the prime divisors of Fibonacci numbers is a special case of the problem of calculating p-Kazhdan–Lusztig polynomials―using only elementary diagrammatic calculations and some manipulation of (5x5)-matrices.

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