| http://www.w3.org/ns/prov#value | - If the lattice is singular (i.e., if there are vectors in V that are perpendicular to everything including themselves) then the singular subspace of V is spanned by the sublattice , which is a direct summand of L. Singular lattices occasionally show up in mainstream mathematics, e.g., as root lattices of affine Lie algebras.
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