Learn why the achievements of Egypt, Babylon and Greece, though child’s play today, still stand as remarkable feats of intellect. It’s humbling to realize that much of high-school math, so vexing to ...

This is a preview. Log in through your library . Abstract We investigate, for several modal logics but concentrating on KT, KD45, S4 and S5, the set of formulas B for which ̅B is provably equivalent ...

“The nail and hammer are fundamental to the manufacture of chairs, tables, stools, cabinets, and other varied items. So are certain ‘Mathematical Formulas or Relationships’ to the solution of diverse ...