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#### 5.8 Method descr

`call p%descr(info, [iout, root, verbosity])`

This method prints a description of the preconditioner `p` to the standard output or to a file. It must be called after `hierachy_build` and `smoothers_build`, or `build`, have been called.

Arguments

`info` | `integer, intent(out)`.
| Error code. If no error, 0 is returned. See Section 7 for details.
`iout` | `integer, intent(in), optional`.
| The id of the file where the preconditioner description will be printed; the default is the standard output.
`root` | `integer, intent(in), optional`.
| The id of the process where the preconditioner description will be printed; the default is `psb_root_`.
`verbosity` | `integer, intent(in), optional`.
| The verbosity level of the description. Default value is 0. For values higher than 0, it prints out further information, e.g., for a distributed multilevel preconditioner the size of the coarse matrices on every process.

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