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Gelfand-Tsetlin Pattern Builder

Interactive exploration of interlacing integer triangles from representation theory

Valid GT Pattern
4 rows

Interlacing Constraint

ai,j ≥ ai+1,j+1 ≥ ai,j+1

Each entry must be ≤ the entry above-left and ≥ the entry above-right. This creates a "sandwiched" constraint between adjacent rows.

About GT Patterns

Gelfand-Tsetlin patterns arise in representation theory of unitary groups GL(n). Each valid pattern corresponds to a basis vector in the irreducible representation indexed by the top row λ.

The number of valid patterns equals the dimension of the representation. They're also in bijection with semi-standard Young tableaux.

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Total Entries
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Sum of All
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Rep. Dimension
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Violations