A polynomial formula for the solution of 3D reflection equation
  We introduce a family of polynomials in $q^2$ and four variables associated with the quantized algebra of functions $A_q(C_2)$. A new formula is presented for the recent solution of the 3D reflection equation in terms of these polynomials specialized to the eigenvalues of the $q$-oscillator operators. 
Atsuo Kuniba and Shouya Maruyama
math-ph math.MP math.QA nlin.SI