Alternative Characterizations
In descriptive complexity, P can be described as the problems expressible in FO (LFP), the class of first-order logic with a least fixed point operator added to it. In Immerman's 1999 textbook on descriptive complexity, Immerman ascribes this result to Vardi and to Immerman.
Read more about this topic: P (complexity)
Famous quotes containing the word alternative:
“Our mother gives us our earliest lessons in love—and its partner, hate. Our father—our “second other”Melaborates on them. Offering us an alternative to the mother-baby relationship . . . presenting a masculine model which can supplement and contrast with the feminine. And providing us with further and perhaps quite different meanings of lovable and loving and being loved.”
—Judith Viorst (20th century)