On 2-edge-connected [a,b]-factors of graphs with Ore-type condition

Let a⩾2 and t⩾2 be two integers. Suppose that G is a 2-edge-connected graph of order |G|⩾2(t+1)((a-2)t+a)+t-1 with minimum degree at least a. Then G has a 2-edge-connected [a,at]-factor if every pair of non-adjacent vertices has degree sum at least 2|G|/(1+t). This lower bound is sharp. As a consequence, we have Ore-type conditions for the existence of a 2-edge-connected [a,b]-factor in graphs.