Diagrammatic Representation And Counting Generators In Temperley–Lieb Algebra.pdf

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Preview of Diagrammatic Representation and Counting Generators in Temperley–Lieb Algebra
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Summary

The Temperley–Lieb algebra (TLn) with parameter δ is a free Z[δ]-module whose basis consists of n-diagrams, where multiplication is defined by identifying the south face of one diagram with the north face of another and replacing closed loops with a factor of δ. This results in linear combinations of n-diagrams, with coefficients being polynomials in δ.

Key Points:

Diagrammatic Representation: TLn diagrams visually represent certain combinatorial structures.
Catalan Numbers: The number of distinct n-diagrams (and thus the rank of TLn) is given by the nth Catalan number (Cn), calculated as (2n)! / (n + 1)!n!.
Well-Formed Parentheses: There's a one-to-one correspondence between n-diagrams and sequences of n pairs of well-formed parentheses.
Multiplication Rule: The product of two diagrams is obtained by gluing their respective "south" and "north" faces, simplifying closed loops, and multiplying by δ.

Description

The Temperley–Lieb algebra is represented diagrammatically, with a one-to-one correspondence to sequences of well-formed parentheses, and the number of n-diagrams (diagrams) equals the nth Catalan number.

Technical Information

  • File Format: PDF
  • File Size: 172 KB
  • Pages: 14
  • Language: EN
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  • Last Updated: 11 hours ago

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