Ribbon tableaux, ribbon rigged configurations and Hall-Littlewood functions at roots of unity

Ribbon Tilings and Multidimensional Height Functions

Rich, Sturmian, and trapezoidal words

Richman games

Riemann sums over polytopes

Riemann-Hilbert problem and the discrete Bessel kernel

Riemann-Roch and Abel-Jacobi theory on a finite graph

Riemann-Roch for Sub-Lattices of the Root Lattice $A_n$

Riemann-Roch theory for weighted graphs and tropical curves

Riffle shuffles of a deck with repeated cards

Rigid Components of Random Graphs

Rigidity and the chess board theorem for cube packings

Rigidity and the Lower Bound Theorem for Doubly Cohen-Macaulay Complexes

Rigidity of Frameworks Supported on Surfaces

Rigidity theory for matroids

Rim Hook Tableaux and Kostant's $η$-Function Coefficients

Ring geometries, Two-Weight Codes and Strongly Regular Graphs

Ring of Polytopes, Quasi-symmetric functions and Fibonacci numbers

Ringel's generalized earth-moon problem

Riordan arrays and applications via the classical umbral calculus