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On the finite element approximation of an elliptic variational inequality arising from an implicit time discretization of the Stefan problem. (English) Zbl 0469.65042

MSC:
65K10 Numerical optimization and variational techniques
65Z05 Applications to the sciences
49J40 Variational inequalities
65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs
35K05 Heat equation
35R35 Free boundary problems for PDEs
35J65 Nonlinear boundary value problems for linear elliptic equations
80A17 Thermodynamics of continua
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