21 Progress in Renormalization Theory Since 1949
نویسندگان
چکیده
Julian Schwinger has given us a brilliant exposition of the renormalization ideas associated with his, Tomonaga's and Dyson's names. My task is to take the story up from the exciting days of 1949 to the present. As Schwinger has reminded us, even though renormalization and infinities are logically distinct, it was the persistent infinities encountered in field theories which brought the necessity of renormalization of mass and charge to the fore. The infinities arise mathematically from undefined products of distributions like
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