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Weierstrass-Erdman Corner Condition

In the calculus of variations, the condition

f_(y^')(x,y,y^'(x_-))=f_(y^')(x,y,y^'(x_+))

must hold at a corner (x,y) of a minimizing arc E_(12).

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Cite this as:

Weisstein, Eric W. "Weierstrass-Erdman Corner Condition." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Weierstrass-ErdmanCornerCondition.html

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