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Variants of Booleanness: Congruences of a partial frame versus those of its free frame

  • John Frith EMAIL logo and Anneliese Schauerte
Published/Copyright: August 9, 2022
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Abstract

This paper concerns notions of Booleanness in the setting of partial frames, which, in contrast to full frames, do not necessarily have all joins. Examples of these include bounded distributive lattices, σ- and κ-frames. We provide four distinct conditions which all reduce in the case of full frames to each element having a complement. These concepts depend heavily on the free frame over a partial frame, the congruence frame of a partial frame and the relations between them. We also examine the adjoint situation between the congruences of a partial frame and those of its free frame.

MSC 2010: 06B10; 06D22
  1. ( (Communicated by Anatolij Dvurečenski )

References

[1] ADÁMEK, J.—HERRLICH, H.—STRECKER, G.: Abstract and Concrete Categories, John Wiley & Sons Inc., New York, 1990.Search in Google Scholar

[2] BANASCHEWSKI, B.: σ-frames unpublished manuscript, 1980.Search in Google Scholar

[3] BANASCHEWSKI, B.—GILMOUR, C. R. A.: Realcompactness and the cozero part of a frame Appl. Categ. Struct. 9 (2001), 395–417.10.1023/A:1011225712426Search in Google Scholar

[4] FRITH, J.—SCHAUERTE, A.: Uniformities and covering properties for partial frames (I) Categ. General Alg. Struct. Appl. 2(1) (2014), 1–21.Search in Google Scholar

[5] FRITH, J.—SCHAUERTE, A.: Uniformities and covering properties for partial frames (II) Categ. General Alg. Struct. Appl. 2(1) (2014), 23–35.Search in Google Scholar

[6] FRITH, J.—SCHAUERTE, A.: Completions of uniform partial frames Acta Math. Hungar. 147(1) (2015), 116–134.10.1007/s10474-015-0514-9Search in Google Scholar

[7] FRITH, J.—SCHAUERTE, A.: Compactifications of partial frames via strongly regular ideals Math. Slovaca 68(2) (2018), 285–298.10.1515/ms-2017-0100Search in Google Scholar

[8] FRITH, J.—SCHAUERTE, A.: The Stone-Čech compactification of a partial frame via ideals and cozero elements Quaest. Math. 39(1) (2016), 115–134.10.2989/16073606.2015.1023866Search in Google Scholar

[9] FRITH, J.—SCHAUERTE, A.: Coverages give free constructions for partial frames Appl. Categ. Struct. 25(3) (2017), 303–321.10.1007/s10485-015-9417-8Search in Google Scholar

[10] FRITH, J.—SCHAUERTE, A.: One-point compactifications and continuity for partial frames Categ. General Alg. Struct. Appl. 7 (2017), 57–88. Special issue on the occasion of Banaschewski’s 90th birthday (II).Search in Google Scholar

[11] FRITH, J.—SCHAUERTE, A.: The congruence frame and the Madden quotient for partial frames Algebra Universalis 79 (2018), Article 73.10.1007/s00012-018-0554-4Search in Google Scholar

[12] FRITH, J.—SCHAUERTE, A.: Meet-semilattice congruences on a frame Appl. Categ. Struct. 26(5) (2018), 997–1013.10.1007/s10485-018-9521-7Search in Google Scholar

[13] FRITH, J.—SCHAUERTE, A.: Partial frames and filter spaces Topology Appl. 263 (2019), 61–73.10.1016/j.topol.2019.05.021Search in Google Scholar

[14] FRITH, J.—SCHAUERTE, A.: Compactifications and reflections of partial spaces via partial frames Topology and its Applications 273 (2020), Art. ID 106982.10.1016/j.topol.2019.106982Search in Google Scholar

[15] FRITH, J.—SCHAUERTE, A.: A look at the structure of congruences frames by means of Heyting congruences Quaest. Math. (2021), accepted.10.2989/16073606.2021.1972052Search in Google Scholar

[16] JOHNSTONE, P. T.: Stone Spaces Cambridge University Press, Cambridge, 1982.Search in Google Scholar

[17] MAC LANE, S.: Categories for the Working Mathematician Springer Verlag, Heidelberg, 1971.10.1007/978-1-4612-9839-7Search in Google Scholar

[18] MADDEN, J. J.: κ-frames J. Pure Appl. Alg. 70 (1991), 107–127.10.1016/0022-4049(91)90011-PSearch in Google Scholar

[19] MANUELL, G.: A special class of congruences on κ-frames Algebra Universalis 78 (2017), 125–130.10.1007/s00012-017-0439-ySearch in Google Scholar

[20] PASEKA, J.: Covers in generalized frames In: Proceedings of the International Conference Summer School on General Algebra and Ordered Sets 1994, Olomouc, Palacky Univ, 1994, pp. 84–99.Search in Google Scholar

[21] PICADO, J.—PULTR, A.: Frames and Locales Springer Verlag, Basel, 2012.10.1007/978-3-0348-0154-6Search in Google Scholar

[22] ZENK, E. R.: Categories of partial frames Algebra Universalis 54 (2005), 213–235.10.1007/s00012-005-1939-8Search in Google Scholar

[23] ZHAO, D.: Nuclei on Z-frames Soochow J. Math. 22(1) (1996), 59–74.Search in Google Scholar

[24] ZHAO, D.: On projective Z-frames Canad. Math. Bull. 40(1) (1997), 39–46.10.4153/CMB-1997-004-4Search in Google Scholar

Received: 2021-05-14
Accepted: 2021-08-05
Published Online: 2022-08-09
Published in Print: 2022-08-26

© 2022 Mathematical Institute Slovak Academy of Sciences

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