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Baire property; first category; second category

References:

[1] N.C. Bose-Majumdar: **On some properties of sets with positive measures**. Annali dell Unversita di Ferrara X(1) (1962), 1–11.

[2] K.P.S. Bhaskara Rao and M. Bhaskara Rao: **On the difference of two second category Baire sets in a topological group**. Proc. Amer. Math. Soc. 47(1) (1975), 257–258. MR 0349893

[3] D.K. Ganguly and S. Basu: **On ratio sets of real numbers**. Indian. Jour. Pure. Appl. Math. 23(1) (1993), 15–20. MR 1203244

[4] Z. Kominek: **On the sum and difference of two sets in topological vector spaces**. Fund. Math. 71(2) (1971), 163–169. DOI 10.4064/fm-71-2-165-169 | MR 0293363 | Zbl 0214.37403

[5] H.I. Miller, Xenikakis and J. Polychronis: **Some properties of Baire sets and sets of positive measure**. Rend. Circ. Mat. Palermo (2)31 (1982), 404–414. DOI 10.1007/BF02851150 | MR 0693586

[7] S. Piccard: **Sur les ensembles de distance**. Memoires Neuchatel Universite, 1938–39.

[8] W. Sander: **A generalization of a theorem of S. Piccard**. Proc. Amer. Math. Soc. 74(2) (1979), 281–282. MR 0516480 | Zbl 0414.54010

[9] H. Steinhaus: **Sur les distances des points des ensembles de measure positive**. Fund. math. 1 (1920), 93–104. DOI 10.4064/fm-1-1-93-104