MathSciNet bibliographic data MR1873794 03E15 (30D20) Sofronidis, Nikolaos Efstathiou Natural examples of \${\bfPi}^0_5\$${\bfPi}^0_5$-complete sets in analysis. Proc. Amer. Math. Soc. 130 (2002), no. 4, 1177–1182. Article

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