Keremedis, Kyriakos; Olfati, Alireza; Wajch, Eliza On \(P\)-spaces and \(G_{\delta}\)-sets in the absence of the axiom of choice. (English) Zbl 07789448 Bull. Belg. Math. Soc. - Simon Stevin 30, No. 2, 194-236 (2023). MSC: 03E25 54G10 54F50 54C30 03E35 54A35 PDFBibTeX XMLCite \textit{K. Keremedis} et al., Bull. Belg. Math. Soc. - Simon Stevin 30, No. 2, 194--236 (2023; Zbl 07789448) Full Text: DOI Link
Keremedis, Kyriakos; Tachtsis, Eleftherios On Hausdorff operators in \(\mathsf{ZF} \). (English) Zbl 07738076 Math. Log. Q. 69, No. 3, 347-369 (2023). MSC: 03-XX PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Tachtsis}, Math. Log. Q. 69, No. 3, 347--369 (2023; Zbl 07738076) Full Text: DOI
Keremedis, Kyriakos; Tachtsis, Eleftherios; Wajch, Eliza On iso-dense and scattered spaces without AC. (English) Zbl 07709605 Result. Math. 78, No. 4, Paper No. 153, 30 p. (2023). MSC: 03E25 03E35 54E35 54G12 54D35 PDFBibTeX XMLCite \textit{K. Keremedis} et al., Result. Math. 78, No. 4, Paper No. 153, 30 p. (2023; Zbl 07709605) Full Text: DOI arXiv
Keremedis, Kyriakos; Tachtsis, Eleftherios; Wajch, Eliza Countable products and countable direct sums of compact metrizable spaces in the absence of the Axiom of Choice. (English) Zbl 07687150 Ann. Pure Appl. Logic 174, No. 7, Article ID 103283, 34 p. (2023). MSC: 03E25 03E35 54A35 54E35 54D30 54B10 PDFBibTeX XMLCite \textit{K. Keremedis} et al., Ann. Pure Appl. Logic 174, No. 7, Article ID 103283, 34 p. (2023; Zbl 07687150) Full Text: DOI arXiv
Keremedis, Kyriakos; Wajch, Eliza Cuf products and cuf sums of (quasi-) metrizable spaces in ZF. (English) Zbl 1524.03039 Period. Math. Hung. 85, No. 2, 448-473 (2022). Reviewer: Martin Weese (Potsdam) MSC: 03E25 03E35 54A35 54D35 54E35 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Wajch}, Period. Math. Hung. 85, No. 2, 448--473 (2022; Zbl 1524.03039) Full Text: DOI arXiv
Keremedis, K.; Tachtsis, E. Stranger things about the cardinality of compact metric spaces without AC. (English) Zbl 1524.03038 Acta Math. Hung. 168, No. 1, 269-294 (2022). Reviewer: Tomasz Natkaniec (Gdańsk) MSC: 03E25 03E35 54A25 54D05 54D65 54E35 54E45 54G12 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Tachtsis}, Acta Math. Hung. 168, No. 1, 269--294 (2022; Zbl 1524.03038) Full Text: DOI
Keremedis, Kyriakos; Wajch, Eliza \(k\)-spaces, sequential spaces and related topics in the absence of the axiom of choice. (English) Zbl 1493.54025 Topology Appl. 318, Article ID 108199, 28 p. (2022). MSC: 54D50 03E25 03E35 54D55 54E50 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Wajch}, Topology Appl. 318, Article ID 108199, 28 p. (2022; Zbl 1493.54025) Full Text: DOI arXiv
Keremedis, Kyriakos; Wajch, Eliza Denumerable cellular families in \(\mathbf{ZF}\). (English) Zbl 07478506 Port. Math. (N.S.) 78, No. 3-4, 281-321 (2021). MSC: 03E25 03E35 54A35 54D20 54D70 54E52 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Wajch}, Port. Math. (N.S.) 78, No. 3--4, 281--321 (2021; Zbl 07478506) Full Text: DOI
Keremedis, Kyriakos; Tachtsis, Eleftherios; Wajch, Eliza Several results on compact metrizable spaces in \(\mathbf{ZF} \). (English) Zbl 1486.03081 Monatsh. Math. 196, No. 1, 67-102 (2021). Reviewer: Boris Šobot (Novi Sad) MSC: 03E25 03E35 54A35 54E35 54D30 PDFBibTeX XMLCite \textit{K. Keremedis} et al., Monatsh. Math. 196, No. 1, 67--102 (2021; Zbl 1486.03081) Full Text: DOI arXiv
Keremedis, Kyriakos; Tachtsis, Eleftherios; Wajch, Eliza Second-countable compact Hausdorff spaces as remainders in ZF and two new notions of infiniteness. (English) Zbl 1485.03207 Topology Appl. 298, Article ID 107732, 29 p. (2021). Reviewer: Boris Šobot (Novi Sad) MSC: 03E25 03E35 54A35 54D35 54D40 54D45 54E35 PDFBibTeX XMLCite \textit{K. Keremedis} et al., Topology Appl. 298, Article ID 107732, 29 p. (2021; Zbl 1485.03207) Full Text: DOI arXiv
Keremedis, Kyriakos; Wajch, Eliza On densely complete metric spaces and extensions of uniformly continuous functions in ZF. (English) Zbl 1483.03030 J. Convex Anal. 27, No. 4, 1099-1122 (2020). Reviewer: Cenap Özel (İzmir) MSC: 03E25 54E35 54E50 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Wajch}, J. Convex Anal. 27, No. 4, 1099--1122 (2020; Zbl 1483.03030) Full Text: arXiv Link
Keremedis, Kyriakos; Wajch, Eliza On Loeb and sequential spaces in ZF. (English) Zbl 1448.54014 Topology Appl. 280, Article ID 107279, 20 p. (2020). Reviewer: Samuel Gomes da Silva (Salvador) MSC: 54D55 54E50 54D45 54A35 03E25 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Wajch}, Topology Appl. 280, Article ID 107279, 20 p. (2020; Zbl 1448.54014) Full Text: DOI arXiv
Keremedis, Kyriakos; Tachtsis, Eleftherios Cellularity of infinite Hausdorff spaces in ZF. (English) Zbl 1484.03103 Topology Appl. 274, Article ID 107104, 20 p. (2020). MSC: 03E25 03E35 54A25 54D10 54D30 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Tachtsis}, Topology Appl. 274, Article ID 107104, 20 p. (2020; Zbl 1484.03103) Full Text: DOI
Keremedis, Kyriakos On lightly and countably compact spaces in \(\mathbf{ZF}\). (English) Zbl 1423.54012 Quaest. Math. 42, No. 5, 579-592 (2019). Reviewer: Samuel Gomes da Silva (Salvador) MSC: 54A35 03E25 54D30 PDFBibTeX XMLCite \textit{K. Keremedis}, Quaest. Math. 42, No. 5, 579--592 (2019; Zbl 1423.54012) Full Text: DOI
Keremedis, Kyriakos; Wajch, Eliza Hausdorff compactifications in ZF. (English) Zbl 1418.54010 Topology Appl. 258, 79-99 (2019). Reviewer: Vladimir Tkachuk (México D. F.) MSC: 54D35 03E25 54D15 03E35 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Wajch}, Topology Appl. 258, 79--99 (2019; Zbl 1418.54010) Full Text: DOI arXiv
Keremedis, Kyriakos Two new equivalents of Lindelöf metric spaces. (English) Zbl 1521.03161 Math. Log. Q. 64, No. 1-2, 37-43 (2018). MSC: 03E25 54E35 54D20 PDFBibTeX XMLCite \textit{K. Keremedis}, Math. Log. Q. 64, No. 1--2, 37--43 (2018; Zbl 1521.03161) Full Text: DOI
Keremedis, Kyriakos On pseudocompactness and light compactness of metric spaces in \(\mathbf {ZF}\). (English) Zbl 1515.03200 Bull. Pol. Acad. Sci., Math. 66, No. 2, 99-113 (2018). MSC: 03E25 54D30 PDFBibTeX XMLCite \textit{K. Keremedis}, Bull. Pol. Acad. Sci., Math. 66, No. 2, 99--113 (2018; Zbl 1515.03200) Full Text: DOI
Keremedis, Kyriakos Some versions of second countability of metric spaces in ZF and their role to compactness. (English) Zbl 1463.54079 Commentat. Math. Univ. Carol. 59, No. 1, 119-134 (2018). MSC: 54E35 54E45 54A35 PDFBibTeX XMLCite \textit{K. Keremedis}, Commentat. Math. Univ. Carol. 59, No. 1, 119--134 (2018; Zbl 1463.54079) Full Text: DOI Link
Keremedis, Kyriakos Second countable UC metric spaces are Lebesgue in ZF. (English) Zbl 1398.54046 Topol. Proc. 52, 73-93 (2018). Reviewer: Eleftherios Tachtsis (Karlovassi) MSC: 54D30 54E35 03E25 54E45 PDFBibTeX XMLCite \textit{K. Keremedis}, Topol. Proc. 52, 73--93 (2018; Zbl 1398.54046)
Herrlich, Horst; Howard, Paul; Keremedis, Kyriakos On extensions of countable filterbases to ultrafilters and ultrafilter compactness. (English) Zbl 1436.03254 Quaest. Math. 41, No. 2, 213-225 (2018). MSC: 03E25 03E35 06E15 54B10 54D30 PDFBibTeX XMLCite \textit{H. Herrlich} et al., Quaest. Math. 41, No. 2, 213--225 (2018; Zbl 1436.03254) Full Text: DOI
Keremedis, Kyriakos On metric spaces where continuous real valued functions are uniformly continuous and related notions. (English) Zbl 1392.54026 Topology Appl. 238, 45-53 (2018). Reviewer: Samuel Gomes da Silva (Salvador) MSC: 54E35 54E45 PDFBibTeX XMLCite \textit{K. Keremedis}, Topology Appl. 238, 45--53 (2018; Zbl 1392.54026) Full Text: DOI
Keremedis, Kyriakos Some notions of separability of metric spaces in \(\mathbf {ZF}\) and their relation to compactness. (English) Zbl 1432.03093 Bull. Pol. Acad. Sci., Math. 64, No. 2-3, 109-136 (2016). MSC: 03E25 54E35 54D65 54D30 PDFBibTeX XMLCite \textit{K. Keremedis}, Bull. Pol. Acad. Sci., Math. 64, No. 2--3, 109--136 (2016; Zbl 1432.03093) Full Text: DOI
Keremedis, Kyriakos On sequential compactness and related notions of compactness of metric spaces in ZF. (English) Zbl 1353.03058 Bull. Pol. Acad. Sci., Math. 64, No. 1, 29-46 (2016). MSC: 03E25 54E45 PDFBibTeX XMLCite \textit{K. Keremedis}, Bull. Pol. Acad. Sci., Math. 64, No. 1, 29--46 (2016; Zbl 1353.03058) Full Text: DOI
Keremedis, Kyriakos On metric spaces where continuous real valued functions are uniformly continuous in \(\mathbf{ZF}\). (English) Zbl 1355.54035 Topology Appl. 210, 366-375 (2016). Reviewer: Szymon Plewik (Katowice) MSC: 54E45 03E25 PDFBibTeX XMLCite \textit{K. Keremedis}, Topology Appl. 210, 366--375 (2016; Zbl 1355.54035) Full Text: DOI
Keremedis, Kyriakos On sequentially closed subsets of the real line in ZF. (English) Zbl 1341.03013 Math. Log. Q. 61, No. 1-2, 24-31 (2015). Reviewer: Eleftherios Tachtsis (Karlovassi) MSC: 03B25 54D55 54E35 PDFBibTeX XMLCite \textit{K. Keremedis}, Math. Log. Q. 61, No. 1--2, 24--31 (2015; Zbl 1341.03013) Full Text: DOI
Herrlich, Horst; Keremedis, Kyriakos Separable connected metric spaces need not have continuum size in \(\mathbf{ZF}\). (English) Zbl 1283.54020 Topology Appl. 161, 397-406 (2014). Reviewer: K. P. Hart (Delft) MSC: 54E35 03E25 54D05 54E45 54F15 54G20 PDFBibTeX XMLCite \textit{H. Herrlich} and \textit{K. Keremedis}, Topology Appl. 161, 397--406 (2014; Zbl 1283.54020) Full Text: DOI
Keremedis, Kyriakos The Boolean prime ideal theorem and products of cofinite topologies. (English) Zbl 1307.03031 Math. Log. Q. 59, No. 6, 382-392 (2013). Reviewer: Eleftherios Tachtsis (Karlovassi) MSC: 03E25 54A35 54B10 PDFBibTeX XMLCite \textit{K. Keremedis}, Math. Log. Q. 59, No. 6, 382--392 (2013; Zbl 1307.03031) Full Text: DOI
Keremedis, Kyriakos On the relative strength of forms of compactness of metric spaces and their countable productivity in \(\mathbf {\text{ZF}}\). (English) Zbl 1254.54032 Topology Appl. 159, No. 16, 3396-3403 (2012). Reviewer: Eleftherios Tachtsis (Karlovassi) MSC: 54E35 03E25 54E45 PDFBibTeX XMLCite \textit{K. Keremedis}, Topology Appl. 159, No. 16, 3396--3403 (2012; Zbl 1254.54032) Full Text: DOI
Herrlich, Horst; Keremedis, Kyriakos Extending compact topologies to compact Hausdorff topologies in \(\mathbf {ZF}\). (English) Zbl 1231.03039 Topology Appl. 158, No. 17, 2279-2286 (2011). Reviewer: Eleftherios Tachtsis (Karlovassi) MSC: 03E25 54A10 54A35 54D10 54G12 54G20 PDFBibTeX XMLCite \textit{H. Herrlich} and \textit{K. Keremedis}, Topology Appl. 158, No. 17, 2279--2286 (2011; Zbl 1231.03039) Full Text: DOI
Keremedis, Kyriakos Tychonoff products of compact spaces in ZF and closed ultrafilters. (English) Zbl 1203.03071 Math. Log. Q. 56, No. 5, 475-487 (2010). Reviewer: Horst Herrlich (Bremen) MSC: 03E25 54B10 54D30 PDFBibTeX XMLCite \textit{K. Keremedis}, Math. Log. Q. 56, No. 5, 475--487 (2010; Zbl 1203.03071) Full Text: DOI
Keremedis, Kyriakos; Tachtsis, Eleftherios Products of some special compact spaces and restricted forms of AC. (English) Zbl 1208.03051 J. Symb. Log. 75, No. 3, 996-1006 (2010). Reviewer: Horst Herrlich (Bremen) MSC: 03E25 03E35 54B10 54D30 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Tachtsis}, J. Symb. Log. 75, No. 3, 996--1006 (2010; Zbl 1208.03051) Full Text: DOI
Herrlich, Horst; Keremedis, Kyriakos Topological sums and products in ZF-set theory. (English) Zbl 1173.54004 Topology Appl. 156, No. 12, 1994-1999 (2009). Reviewer: Paul Bankston (Milwaukee) MSC: 54B30 03E25 18B30 54B10 PDFBibTeX XMLCite \textit{H. Herrlich} and \textit{K. Keremedis}, Topology Appl. 156, No. 12, 1994--1999 (2009; Zbl 1173.54004) Full Text: DOI
Herrlich, Horst; Keremedis, Kyriakos; Tachtsis, Eleftherios Tychonoff products of super second countable and super separable metric spaces. (English) Zbl 1171.54021 Cah. Topol. Géom. Différ. Catég. 49, No. 4, 267-279 (2008). Reviewer: Kiyoshi Iseki (Osaka) MSC: 54D70 54B10 54D65 54E35 03E25 PDFBibTeX XMLCite \textit{H. Herrlich} et al., Cah. Topol. Géom. Différ. Catég. 49, No. 4, 267--279 (2008; Zbl 1171.54021) Full Text: EuDML
De la Cruz, Omar; Hall, Eric J.; Howard, Paul; Keremedis, Kyriakos; Rubin, Jean E. Unions and the axiom of choice. (English) Zbl 1155.03038 Math. Log. Q. 54, No. 6, 652-665 (2008). MSC: 03E25 03E35 20B35 PDFBibTeX XMLCite \textit{O. De la Cruz} et al., Math. Log. Q. 54, No. 6, 652--665 (2008; Zbl 1155.03038) Full Text: DOI
Keremedis, Kyriakos; Tachtsis, Eleftherios Countable compact Hausdorff spaces need not be metrizable in ZF. (English) Zbl 1115.03067 Proc. Am. Math. Soc. 135, No. 4, 1205-1211 (2007). Reviewer: Paul J. Szeptycki (Toronto) MSC: 03E25 03E35 54A35 54D30 54D35 54E35 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Tachtsis}, Proc. Am. Math. Soc. 135, No. 4, 1205--1211 (2007; Zbl 1115.03067) Full Text: DOI
Keremedis, Kyriakos; Tachtsis, Eleftherios Weak axioms of choice for metric spaces. (English) Zbl 1090.03021 Proc. Am. Math. Soc. 133, No. 12, 3691-3701 (2005). Reviewer: Tomasz Natkaniec (Gdańsk) MSC: 03E25 54A35 54E35 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Tachtsis}, Proc. Am. Math. Soc. 133, No. 12, 3691--3701 (2005; Zbl 1090.03021) Full Text: DOI
Keremedis, Kyriakos; Tachtsis, Eleftherios On sequentially compact subspaces of \(\mathbb R\) without the axiom of choice. (English) Zbl 1071.03035 Notre Dame J. Formal Logic 44, No. 3, 175-184 (2003). MSC: 03E25 54D30 54D55 PDFBibTeX XMLCite \textit{K. Keremedis} and \textit{E. Tachtsis}, Notre Dame J. Formal Logic 44, No. 3, 175--184 (2003; Zbl 1071.03035) Full Text: DOI
Keremedis, Kyriakos Weak Hausdorff gaps and the \({\mathfrak p}<{\mathfrak t}\) problem. (English) Zbl 0929.03053 Math. Log. Q. 45, No. 1, 95-104 (1999). MSC: 03E35 54D20 54A35 PDFBibTeX XMLCite \textit{K. Keremedis}, Math. Log. Q. 45, No. 1, 95--104 (1999; Zbl 0929.03053) Full Text: DOI
Keremedis, Kyriakos On the covering and the additivity number of the real line. (English) Zbl 0823.03026 Proc. Am. Math. Soc. 123, No. 5, 1583-1590 (1995). MSC: 03E35 03E40 PDFBibTeX XMLCite \textit{K. Keremedis}, Proc. Am. Math. Soc. 123, No. 5, 1583--1590 (1995; Zbl 0823.03026) Full Text: DOI