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#W rvecempt.gd GAP library Thomas Breuer
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#Y Copyright (C) 1997, Lehrstuhl D für Mathematik, RWTH Aachen, Germany
#Y (C) 1998 School Math and Comp. Sci., University of St Andrews, Scotland
#Y Copyright (C) 2002 The GAP Group
##
## This file contains the implementation of immutable empty row vectors.
## An empty row vector is an immutable empty list whose family is
## a collections family.
## Empty row vectors are different if their families are different,
## especially the ordinary empty list `[]' is different from every empty
## row vector.
##
## The first case where empty row vectors turned out to be necessary was
## in the representation of elements of a zero dimensional s.c. algebra.
##
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##
#A EmptyRowVector( <F> )
##
## is an empty row vector whose family is the collections family of <F>.
##
DeclareAttribute( "EmptyRowVector", IsFamily );
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##
#E
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