What is "nonperturbative"

Usage examples of "nonperturbative".

These questions require more sharply honed nonperturbative methods than we currently possess.

Although the second superstring revolution has provided some nonperturbative techniques, it will be some time before they are honed for the kinds of calculations required in a cosmological setting.

The next breakthrough, most everyone in the field agreed, would require a nonperturbative approach—an approach that was not shackled to approximate calculational techniques and could therefore reach well beyond the limitations of the perturbative framework.