1) конвергентный 2) сужающийся 3) сходящийся
прилагательное сходящийся в одной точке Например: convergent angle [математика] — угол конвергенции
adjective 1. tending to move toward one point or to approach each other; converging Example: convergent lines 2. exhibiting convergence in form, function, or development Example: convergent evolution 3. a. of an improper integral having a value that is a real number b. characterized by having the nth term or the sum of the first n terms approach a finite limit Example: a convergent sequence Example: a convergent series