Wiktionary
single-valued
a. (context mathematics English) Of a function, associating a unique value of its range with each value of its domain.
Usage examples of "single-valued".
Both digital and analog simulations of the war-sphere, projected at least a hundred years into the future, did not yield any single-valued solution.
Either way, as the war-sphere spread it lost dynamic stability, and though its fate was not amenable to a single-valued prediction, that fate went beyond the interests of the sides that had begun the struggle.