Kathleen A. Hoffman


The Bordered Operator and the Index of a Constrained Critical Point L. Greenberg, J.H. Maddocks, and K.A. (Rogers) Hoffman Abstract: It is shown that the index of a constrained critical point in the isoperimetric calculus of variations is simply related to the number of negative eigenvalues of a certain bordered operator associated with the second variation. A conjugate point theory for this bordered operator is then established. 
