Dear GAP-Froum, dear Saad,

> But not always the output is what you mean:
>
> gap> Print(Size,"\n");
> <Operation "Size">
> gap>
>
In this case, ApplicableMethod can be used, for instance:

gap> ApplicableMethod( Size, [ Group((1,2,3),(1,2)) ], 1 ); 
#I  Searching Method for Size with 1 arguments: 
#I  Total: 53 entries 
#I  Method 13: ``Size: for a permutation group'', value: 31 
function( G ) ... end 
gap> Print( last, "\n" ); 
function ( G ) 
    return SizeStabChain( StabChainMutable( G ) ); 
end 
gap> 

And then you can search the string "Size: for a permutation group" instead
of the string "Size" in the library (Alexander Konovalov told how to
search in the library).

Greetings,
Marco Costantini