/usr/lib/open-axiom/src/algebra/attreg.spad is in open-axiom-source 1.4.1+svn~2626-2ubuntu2.
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)abbrev category ATTREG AttributeRegistry
++ This category exports the attributes in the AXIOM Library
AttributeRegistry(): Category == with
finiteAggregate
++ \spad{finiteAggregate} is true if it is an aggregate with a
++ finite number of elements.
commutative("*")
++ \spad{commutative("*")} is true if it has an operation
++ \spad{"*": (D,D) -> D} which is commutative.
shallowlyMutable
++ \spad{shallowlyMutable} is true if its values
++ have immediate components that are updateable (mutable).
++ Note: the properties of any component domain are irrevelant to the
++ \spad{shallowlyMutable} proper.
unitsKnown
++ \spad{unitsKnown} is true if a monoid (a multiplicative semigroup
++ with a 1) has \spad{unitsKnown} means that
++ the operation \spadfun{recip} can only return "failed"
++ if its argument is not a unit.
leftUnitary
++ \spad{leftUnitary} is true if \spad{1 * x = x} for all x.
rightUnitary
++ \spad{rightUnitary} is true if \spad{x * 1 = x} for all x.
noZeroDivisors
++ \spad{noZeroDivisors} is true if \spad{x * y \~~= 0} implies
++ both x and y are non-zero.
canonicalUnitNormal
++ \spad{canonicalUnitNormal} is true if we can choose a canonical
++ representative for each class of associate elements, that is
++ \spad{associates?(a,b)} returns true if and only if
++ \spad{unitCanonical(a) = unitCanonical(b)}.
canonicalsClosed
++ \spad{canonicalsClosed} is true if
++ \spad{unitCanonical(a)*unitCanonical(b) = unitCanonical(a*b)}.
arbitraryPrecision
++ \spad{arbitraryPrecision} means the user can set the
++ precision for subsequent calculations.
partiallyOrderedSet
++ \spad{partiallyOrderedSet} is true if
++ a set with \spadop{<} which is transitive,
++ but \spad{not(a < b or a = b)}
++ does not necessarily imply \spad{b<a}.
central
++ \spad{central} is true if, given an algebra over a ring R,
++ the image of R is the center
++ of the algebra, i.e. the set of members of the algebra which commute
++ with all others is precisely the image of R in the algebra.
noetherian
++ \spad{noetherian} is true if all of its ideals are finitely generated.
additiveValuation
++ \spad{additiveValuation} implies
++ \spad{euclideanSize(a*b)=euclideanSize(a)+euclideanSize(b)}.
multiplicativeValuation
++ \spad{multiplicativeValuation} implies
++ \spad{euclideanSize(a*b)=euclideanSize(a)*euclideanSize(b)}.
NullSquare
++ \axiom{NullSquare} means that \axiom{[x,x] = 0} holds.
++ See \axiomType{LieAlgebra}.
JacobiIdentity
++ \axiom{JacobiIdentity} means that
++ \axiom{[x,[y,z]]+[y,[z,x]]+[z,[x,y]] = 0} holds.
++ See \axiomType{LieAlgebra}.
canonical
++ \spad{canonical} is true if and only if distinct elements have
++ distinct data structures. For example, a domain of mathematical objects
++ which has the \spad{canonical} attribute means that two objects
++ are mathematically
++ equal if and only if their data structures are equal.
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