Partial differential equation boundary conditions which give the value of the
function on a surface, e.g., 
.
Dirichlet Boundary Conditions
See also
Boundary Conditions, Cauchy ConditionsExplore with Wolfram|Alpha
References
Morse, P. M. and Feshbach, H. Methods of Theoretical Physics, Part I. New York: McGraw-Hill, p. 679, 1953.Referenced on Wolfram|Alpha
Dirichlet Boundary ConditionsCite this as:
Weisstein, Eric W. "Dirichlet Boundary Conditions." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/DirichletBoundaryConditions.html