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boundary condition in VariationalBound

  • To: mathgroup at
  • Subject: [mg124860] boundary condition in VariationalBound
  • From: janos <janostothmeister at>
  • Date: Thu, 9 Feb 2012 05:43:56 -0500 (EST)
  • Delivered-to:

Is there any way to include the the boundary condition into

VariationalBound[Sqrt[1 + Derivative[1][y][x]^2], y[x], {x, 0, 1}, a +
b x, {a}, {b}]


{1., {b -> 0}}

which really minimizes the functional but in the class of all linear
functions not restricting the minimization onto those which fulfil,
say, y[0]=0, y[1]=1.

Perhaps one should reformulate the problem?

The same problem does not arise when usin EulerEquations or

Thank you.


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