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extend the element naming prefix to more general setting, and so use more elaborate identifier

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This commit is contained in:
Glen Whitney 2017-10-19 01:11:26 +02:00
parent 9d8dfdb9e2
commit 88533fd7de
3 changed files with 17 additions and 14 deletions
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4
gap/elements.gi
View File

@ -17,7 +17,7 @@ InstallMethod( PrintObj, "for a quasigroup element",
function( obj )
local F;
F := FamilyObj( obj );
Print( F!.names, obj![ 1 ] );
Print( F!.elmNamePrefix, obj![ 1 ] );
end );
InstallMethod( PrintObj, "for a loop element",
@ -25,7 +25,7 @@ InstallMethod( PrintObj, "for a loop element",
function( obj )
local F;
F := FamilyObj( obj );
Print( F!.names, obj![ 1 ] );
Print( F!.elmNamePrefix, obj![ 1 ] );
end );
InstallMethod( \=, "for two elements of a quasigroup",

5
gap/quasigroups.gd
View File

@ -99,8 +99,9 @@ DeclareOperation( "NormalizedQuasigroupTable", [ IsMatrix ] );
DeclareAttribute( "CayleyTable", IsMagma );
DeclareOperation( "QuasigroupByCayleyTable", [ IsMatrix ] );
DeclareOperation( "LoopByCayleyTable", [ IsMatrix ] );
DeclareOperation( "SetQuasigroupElmName", [ IsQuasigroup, IsString ] );
DeclareSynonym( "SetLoopElmName", SetQuasigroupElmName );
DeclareOperation( "SpecifyElmNamePrefix", [ IsCollection, IsString ] );
DeclareSynonym( "SetQuasigroupElmName", SpecifyElmNamePrefix );
DeclareSynonym( "SetLoopElmName", SpecifyElmNamePrefix );
DeclareAttribute( "ConstructorFromTable", IsMagma );
DeclareOperation( "CanonicalCopy", [ IsMagma ] );

22
gap/quasigroups.gi
View File

@ -187,7 +187,7 @@ function( ct )
NewType( F, IsQuasigroupElement and IsQuasigroupElmRep), [ i ] ) ) );
F!.set := elms;
F!.cayleyTable := ct;
F!.names := "q";
F!.elmNamePrefix := "q";
# creating the quasigroup
Q := Objectify( NewType( FamilyObj( elms ),
IsQuasigroup and IsAttributeStoringRep ), rec() );
@ -196,7 +196,7 @@ function( ct )
SetAsSSortedList( Q, elms );
SetParent( Q, Q );
SetCayleyTable( Q, ct );
SetConstructorFromTable(QuasigroupByCayleyTable);
SetConstructorFromTable(Q, QuasigroupByCayleyTable);
return Q;
end );
@ -225,7 +225,7 @@ function( ct )
NewType( F, IsLoopElement and IsLoopElmRep), [ i ] ) ) );
F!.set := elms;
F!.cayleyTable := ct;
F!.names := "l";
F!.elmNamePrefix := "l";
# creating the loop
L := Objectify( NewType( FamilyObj( elms ),
IsLoop and IsAttributeStoringRep ), rec() );
@ -235,22 +235,24 @@ function( ct )
SetParent( L, L );
SetCayleyTable( L, ct );
SetOne( L, elms[ 1 ] );
SetConstructorFromTable(LoopByCayleyTable);
SetConstructorFromTable(L, LoopByCayleyTable);
return L;
end );
#############################################################################
##
#O SetQuasigroupElmName( Q, name )
#O SpecifyElmNamePrefix( C, name )
##
## Changes the name of elements of quasigroup or loop <Q> to <name>
## Sets the elmNamePrefix property on the family of a Represntative of
## collection <C>. For quasigroups, loops, and possibly related structures
## this changes the prefix with which the elements of that family are printed.
InstallMethod( SetQuasigroupElmName, "for quasigroup and string",
[ IsQuasigroup, IsString ],
InstallMethod( SpecifyElmNamePrefix, "for collection and string",
[ IsCollection, IsString ],
function( Q, name )
local F;
F := FamilyObj( Elements( Q )[ 1 ] );
F!.names := name;
F := FamilyObj( Representative( Q ) );
F!.elmNamePrefix := name;
end);
#############################################################################