.. _BFGS:

BFGS Algorithm
----------------
.. function:: algorithm BFGS <$count>

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   * - Argument
     - Type
     - Description
   * - $count
     - |integer|
     - number of iterations within a time step until a new tangent is formed
 

This command is used to construct a BFGS algorithm object for symmetric systems which performs successive rank-two updates of the tangent at the first iteration of the current time step.