Universal sets for ideals and the porosity thereof

References

[1] A. Cieślak and M. Michalski, Universal sets for ideals, Bull. Pol. Acad. Sci. Math. 66 (2018), no. 2, 157–166. 10.4064/ba8146-5-2018Search in Google Scholar

[2] K. Mazur, F σ -ideals and ω 1 ⁢ ω 1 * -gaps in the Boolean algebras P ⁢ ( ω ) / I , Fund. Math. 138 (1991), no. 2, 103–111. 10.4064/fm-138-2-103-111Search in Google Scholar

[3] L. Zajíček, On σ-porous sets in abstract spaces, Abstr. Appl. Anal. 2005 (2005), no. 5, 509–534. 10.1155/AAA.2005.509Search in Google Scholar

[4] M. Zelený and J. Pelant, The structure of the σ-ideal of σ-porous sets, Comment. Math. Univ. Carolin. 45 (2004), no. 1, 37–72. Search in Google Scholar