kPQ
kPQ is a symbolic label used in multiple disciplines to denote a quantity related to a pair of entities P and Q, often with an additional scalar k. There is no single standard definition for kPQ; its meaning is determined by context, with k typically a scalar or an integer and P and Q representing points, states, nodes, or variables.
In geometry and linear algebra, kPQ is commonly interpreted as a scaled relation between P and Q.
In other contexts, kPQ serves as a label or index rather than a geometric object. For example,
Because the meaning depends on the source, readers should consult the specific definition provided in the text