In dual methods, such as FETI, the continuity of the solution across the subdomain interface is enforced by Lagrange multipliers.
LaGrange | Marie-Joseph Lagrange | Lagrange: The Flower of Rin-ne | Lagrange | Reginald Garrigou-Lagrange | LaGrange College | Pierre Lagrange | Lagrange polynomial | (Lagrange) polynomial | Lagrange multiplier | LaGrange, Indiana | Lagrange, Indiana | Joseph-Louis Lagrange |