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Critical behavior and exponents above the -transition points in charged and neutral Bose systems are examined with emphasis on the correlation of density fluctuations. Exponents are calculated with Wilson's expansion methods for arbitrary d to O (1m), where d is the dimension and m the number of components of the Bose field. Some results for arbitrary m to O (^2) (=4-d) are also obtained.
Shang-keng Ma (Mon,) studied this question.