Well-covered Token graphs

The $k$-token graph $T_k(G)$ is the whose vertices are $k$-subsets of a $G$, with two adjacent if their symmetric difference an edge $G$. We explore when well-covered graph, that is, all its maximal independent sets have same cardinality. For bipartite graphs we classify well-covered. arbitrary show $T_2(G)$ well-covered, then girth $G$ at most four. include upper and lower bounds on independence number $T_k(G)$, provide some families token graphs.