“…It was shown in [50] that the center Z of U q sℓ(2), as an associative commutative algebra and as an SL(2, Z) representation, is indeed extracted from a representation space of the simplest Cherednik algebra H, defined by the relations T XT = X −1 , T Y −1 T = Y, XY = qY XT 2 , (T − q)(T + q −1 ) = 0 on the generators T , X, Y , and their inverse. In these terms, the P SL(2, Z) action is defined by the elements τ + = 1 1 0 1 and τ − = 1 0 1 1 being realized as the H automorphisms [49] τ + : X → X, Y → q −1/2 XY, T → T, τ − : X → q 1/2 Y X, Y → Y, T → T.…”