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FindRoot::dfmin

FindRoot::dfmin

Details

  • This message comes up when nonlinear system of equations has reached the minimal damping factor allowed and is then unable to solve the equations.
  • For the case of nonlinear partial differential equations, an "InitialSeeding" can be specified to use a seed different than the default starting seed.
  • Off[message] switches off the message; On[message] switches it on. For example: Off[FindRoot::dfmin].

Examples

Basic Examples  (1)

Consider this nonlinear PDE:

A way to find an initial seed is to solve a related linear problem by removing at least the nonlinear terms. In this case, some linear terms have also been removed:

This initial seed can now be used to solve the nonlinear PDE: