The basic problem in formulating a quantum theory of gravity was already recognized ... the problem was confirmed explicitly in the first Feynman-diagram calculations of the radiative corrections ...

Most organic molecules have a mirror-image twin. This concept is known as chirality. Yet life only uses one chiral molecule, not the other. The reason for this asymmetry is one of the greatest ...

The necessity of describing three-nucleon and three-quark systems have led to a constant interest in the problem of three particles. The question of including relativistic effects appeared together ...

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The work of 't Hooft established a connection between gauge theories and string theory by showing that Feynman diagrams generate 2-dim. surfaces in the 1/N expansion. Wilson's lattice gauge theory [1] ...