variable identifier article: refer to the referents of the variable having the following predicate as its name; such a variable may be implicitly bound by {PA broda} or {LE broda} phrases; if no such variable has been previously bound, the referents are left to the context to determine; the referents are not claimed to actually satisfy the predicate after which the variable is named.
Named reference. It converts a sumti into another sumti. The converted sumti points to the referent the name of which is the referent of the unconverted sumti.
x1 is an eigenvalue (or zero) of linear transformation/square matrix x2, associated with/'owning' all vectors in generalized eigenspace x3 (implies neither nondegeneracy nor degeneracy; default includes the zero vector) with 'eigenspace-generalization' power/exponent x4 (typically and probably by cultural default will be 1), with algebraic multiplicity (of eigenvalue) x5
x1 is a place erased from the place structure of the parent predicate according to the rules x2 (property of all the places of the parent predicate including the one filled with x1)
x1 is/are the thing(s) described/named with property x2 by the speaker, who thinks this is contextually enough information for the listener to understand what are x1's referent(s)