Quantum K theory and 3d Chern-Simons matter theory

We include a simplified method for computing Chern-Simons levels pertinent to standard quantum K theory. Then we use the three-dimensional Chern-Simons matter theory to make physical predictions for presentations of equivariant quantum K theory rings of Grassmannian and Flags, as OPEs of Wilson lines for certain Chern-Simons levels. We will also present quantum K-ring relations in terms of the so-called Lambda_y class which can be regarded as a K-theoretic version of the Chern class.