In finite element modeling, which formulation introduces constraints on variables and satisfies them in an approximate sense?

Lagrange multiplier formulation

In finite element modeling, which formulation introduces constraints o

1.	In finite element modeling, which formulation introduces constraints on variables and satisfies them in an approximate sense?
A.	Velocity-pressure formulation
B.	Penalty formulation
C.	Mixed formulation
D.	Lagrange multiplier formulation
Answer» C. Mixed formulation

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