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3 The Info Class of the Package
 3.1 The Info Class of the Package

3 The Info Class of the Package

The info mechanism in GAP allows functions to print information during the computation (see Section Reference: Info Functions in the GAP reference manual for general information).

3.1 The Info Class of the Package

3.1-1 InfoRadiroot
‣ InfoRadiroot( info class )

is the info class of this package.

3.1-2 SetInfoLevel
‣ SetInfoLevel( infoclass, level )( operation )

sets the info level for InfoRadiroot to level, where level has to be an integer in the range 0-4.

The default value for InfoRadiroot is 1. Information why a function returns fail will be given with this setting.

gap> InfoLevel(InfoRadiroot);
1
gap> RootsOfPolynomialAsRadicals(x^5-4*x+2);
#I  Polynomial is not solvable.
fail

Setting the info level to a higher value will cause messages to show up during single steps of the computation. On level 2 one gets a rough overview. Those who want to go into the details of the algorithm described in [Dis05] and of the implementation itself will find the information on level 3-4 helpful.

To use the package in silent mode the info level can be given the value 0.

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