Aside from the obvious statement that it should be a theory capable of unifying general relativity and quantum field theory, not much is known about the true nature of quantum gravity. New ideas - and there are many of them for this is...

Das Buch "The Maslov Index in Symplectic Banach Spaces" von Bernhelm Booss-Bavnbek behandelt die mathematische Theorie des Maslov-Index, einer topologischen Invariante, die in der symplektischen Geometrie und Analysis eine wichtige Rolle...