Balls in generalizations of metric spaces
Abstract This paper discusses balls in partial b-metric spaces and cone metric spaces, respectively. Let ( X , p b ) $(X,p_{b})$ be a partial b-metric space in the sense of Mustafa et al. For the family △ of all p b $p_{b}$ -open balls in ( X , p b ) $(X,p_{b})$ , this paper proves that there are x...
Ausführliche Beschreibung
Autor*in: |
Xun Ge [verfasserIn] Shou Lin [verfasserIn] |
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Format: |
E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2016 |
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Übergeordnetes Werk: |
In: Journal of Inequalities and Applications - SpringerOpen, 2002, (2016), 1, Seite 7 |
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Übergeordnetes Werk: |
year:2016 ; number:1 ; pages:7 |
Links: |
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DOI / URN: |
10.1186/s13660-016-0962-y |
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Katalog-ID: |
DOAJ043357814 |
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10.1186/s13660-016-0962-y doi (DE-627)DOAJ043357814 (DE-599)DOAJefc111cd81694827ab68106af9e532cf DE-627 ger DE-627 rakwb eng QA1-939 Xun Ge verfasserin aut Balls in generalizations of metric spaces 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract This paper discusses balls in partial b-metric spaces and cone metric spaces, respectively. Let ( X , p b ) $(X,p_{b})$ be a partial b-metric space in the sense of Mustafa et al. For the family △ of all p b $p_{b}$ -open balls in ( X , p b ) $(X,p_{b})$ , this paper proves that there are x , y ∈ B ∈ △ $x,y\in B\in\triangle$ such that B ′ ⊈ B $B'\nsubseteq B$ for all B ′ ∈ △ $B'\in\triangle$ , where B and B ′ $B'$ are with centers x and y, respectively. This result shows that △ is not a base of any topology on X, which shows that a proposition and a claim on partial b-metric spaces are not true. By some relations among ≪, <, and ≤ in cone metric spaces, this paper also constructs a cone metric space ( X , d ) $(X,d)$ and shows that { y ∈ X : d ( x , y ) ≪ ε } ‾ ≠ { y ∈ X : d ( x , y ) ≤ ε } $\overline{\{y\in X:d(x,y)\ll\varepsilon\}}\ne\{y\in X:d(x,y)\le\varepsilon\}$ in general, which corrects an error on cone metric spaces. However, it must be emphasized that these corrections do not affect the rest of the results in the relevant papers. ball partial b-metric space cone metric space Mathematics Shou Lin verfasserin aut In Journal of Inequalities and Applications SpringerOpen, 2002 (2016), 1, Seite 7 (DE-627)320977056 (DE-600)2028512-7 1029242X nnns year:2016 number:1 pages:7 https://doi.org/10.1186/s13660-016-0962-y kostenfrei https://doaj.org/article/efc111cd81694827ab68106af9e532cf kostenfrei http://link.springer.com/article/10.1186/s13660-016-0962-y kostenfrei https://doaj.org/toc/1029-242X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 2016 1 7 |
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10.1186/s13660-016-0962-y doi (DE-627)DOAJ043357814 (DE-599)DOAJefc111cd81694827ab68106af9e532cf DE-627 ger DE-627 rakwb eng QA1-939 Xun Ge verfasserin aut Balls in generalizations of metric spaces 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract This paper discusses balls in partial b-metric spaces and cone metric spaces, respectively. Let ( X , p b ) $(X,p_{b})$ be a partial b-metric space in the sense of Mustafa et al. For the family △ of all p b $p_{b}$ -open balls in ( X , p b ) $(X,p_{b})$ , this paper proves that there are x , y ∈ B ∈ △ $x,y\in B\in\triangle$ such that B ′ ⊈ B $B'\nsubseteq B$ for all B ′ ∈ △ $B'\in\triangle$ , where B and B ′ $B'$ are with centers x and y, respectively. This result shows that △ is not a base of any topology on X, which shows that a proposition and a claim on partial b-metric spaces are not true. By some relations among ≪, <, and ≤ in cone metric spaces, this paper also constructs a cone metric space ( X , d ) $(X,d)$ and shows that { y ∈ X : d ( x , y ) ≪ ε } ‾ ≠ { y ∈ X : d ( x , y ) ≤ ε } $\overline{\{y\in X:d(x,y)\ll\varepsilon\}}\ne\{y\in X:d(x,y)\le\varepsilon\}$ in general, which corrects an error on cone metric spaces. However, it must be emphasized that these corrections do not affect the rest of the results in the relevant papers. ball partial b-metric space cone metric space Mathematics Shou Lin verfasserin aut In Journal of Inequalities and Applications SpringerOpen, 2002 (2016), 1, Seite 7 (DE-627)320977056 (DE-600)2028512-7 1029242X nnns year:2016 number:1 pages:7 https://doi.org/10.1186/s13660-016-0962-y kostenfrei https://doaj.org/article/efc111cd81694827ab68106af9e532cf kostenfrei http://link.springer.com/article/10.1186/s13660-016-0962-y kostenfrei https://doaj.org/toc/1029-242X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 2016 1 7 |
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10.1186/s13660-016-0962-y doi (DE-627)DOAJ043357814 (DE-599)DOAJefc111cd81694827ab68106af9e532cf DE-627 ger DE-627 rakwb eng QA1-939 Xun Ge verfasserin aut Balls in generalizations of metric spaces 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract This paper discusses balls in partial b-metric spaces and cone metric spaces, respectively. Let ( X , p b ) $(X,p_{b})$ be a partial b-metric space in the sense of Mustafa et al. For the family △ of all p b $p_{b}$ -open balls in ( X , p b ) $(X,p_{b})$ , this paper proves that there are x , y ∈ B ∈ △ $x,y\in B\in\triangle$ such that B ′ ⊈ B $B'\nsubseteq B$ for all B ′ ∈ △ $B'\in\triangle$ , where B and B ′ $B'$ are with centers x and y, respectively. This result shows that △ is not a base of any topology on X, which shows that a proposition and a claim on partial b-metric spaces are not true. By some relations among ≪, <, and ≤ in cone metric spaces, this paper also constructs a cone metric space ( X , d ) $(X,d)$ and shows that { y ∈ X : d ( x , y ) ≪ ε } ‾ ≠ { y ∈ X : d ( x , y ) ≤ ε } $\overline{\{y\in X:d(x,y)\ll\varepsilon\}}\ne\{y\in X:d(x,y)\le\varepsilon\}$ in general, which corrects an error on cone metric spaces. However, it must be emphasized that these corrections do not affect the rest of the results in the relevant papers. ball partial b-metric space cone metric space Mathematics Shou Lin verfasserin aut In Journal of Inequalities and Applications SpringerOpen, 2002 (2016), 1, Seite 7 (DE-627)320977056 (DE-600)2028512-7 1029242X nnns year:2016 number:1 pages:7 https://doi.org/10.1186/s13660-016-0962-y kostenfrei https://doaj.org/article/efc111cd81694827ab68106af9e532cf kostenfrei http://link.springer.com/article/10.1186/s13660-016-0962-y kostenfrei https://doaj.org/toc/1029-242X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 2016 1 7 |
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10.1186/s13660-016-0962-y doi (DE-627)DOAJ043357814 (DE-599)DOAJefc111cd81694827ab68106af9e532cf DE-627 ger DE-627 rakwb eng QA1-939 Xun Ge verfasserin aut Balls in generalizations of metric spaces 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract This paper discusses balls in partial b-metric spaces and cone metric spaces, respectively. Let ( X , p b ) $(X,p_{b})$ be a partial b-metric space in the sense of Mustafa et al. For the family △ of all p b $p_{b}$ -open balls in ( X , p b ) $(X,p_{b})$ , this paper proves that there are x , y ∈ B ∈ △ $x,y\in B\in\triangle$ such that B ′ ⊈ B $B'\nsubseteq B$ for all B ′ ∈ △ $B'\in\triangle$ , where B and B ′ $B'$ are with centers x and y, respectively. This result shows that △ is not a base of any topology on X, which shows that a proposition and a claim on partial b-metric spaces are not true. By some relations among ≪, <, and ≤ in cone metric spaces, this paper also constructs a cone metric space ( X , d ) $(X,d)$ and shows that { y ∈ X : d ( x , y ) ≪ ε } ‾ ≠ { y ∈ X : d ( x , y ) ≤ ε } $\overline{\{y\in X:d(x,y)\ll\varepsilon\}}\ne\{y\in X:d(x,y)\le\varepsilon\}$ in general, which corrects an error on cone metric spaces. However, it must be emphasized that these corrections do not affect the rest of the results in the relevant papers. ball partial b-metric space cone metric space Mathematics Shou Lin verfasserin aut In Journal of Inequalities and Applications SpringerOpen, 2002 (2016), 1, Seite 7 (DE-627)320977056 (DE-600)2028512-7 1029242X nnns year:2016 number:1 pages:7 https://doi.org/10.1186/s13660-016-0962-y kostenfrei https://doaj.org/article/efc111cd81694827ab68106af9e532cf kostenfrei http://link.springer.com/article/10.1186/s13660-016-0962-y kostenfrei https://doaj.org/toc/1029-242X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 2016 1 7 |
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10.1186/s13660-016-0962-y doi (DE-627)DOAJ043357814 (DE-599)DOAJefc111cd81694827ab68106af9e532cf DE-627 ger DE-627 rakwb eng QA1-939 Xun Ge verfasserin aut Balls in generalizations of metric spaces 2016 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract This paper discusses balls in partial b-metric spaces and cone metric spaces, respectively. Let ( X , p b ) $(X,p_{b})$ be a partial b-metric space in the sense of Mustafa et al. For the family △ of all p b $p_{b}$ -open balls in ( X , p b ) $(X,p_{b})$ , this paper proves that there are x , y ∈ B ∈ △ $x,y\in B\in\triangle$ such that B ′ ⊈ B $B'\nsubseteq B$ for all B ′ ∈ △ $B'\in\triangle$ , where B and B ′ $B'$ are with centers x and y, respectively. This result shows that △ is not a base of any topology on X, which shows that a proposition and a claim on partial b-metric spaces are not true. By some relations among ≪, <, and ≤ in cone metric spaces, this paper also constructs a cone metric space ( X , d ) $(X,d)$ and shows that { y ∈ X : d ( x , y ) ≪ ε } ‾ ≠ { y ∈ X : d ( x , y ) ≤ ε } $\overline{\{y\in X:d(x,y)\ll\varepsilon\}}\ne\{y\in X:d(x,y)\le\varepsilon\}$ in general, which corrects an error on cone metric spaces. However, it must be emphasized that these corrections do not affect the rest of the results in the relevant papers. ball partial b-metric space cone metric space Mathematics Shou Lin verfasserin aut In Journal of Inequalities and Applications SpringerOpen, 2002 (2016), 1, Seite 7 (DE-627)320977056 (DE-600)2028512-7 1029242X nnns year:2016 number:1 pages:7 https://doi.org/10.1186/s13660-016-0962-y kostenfrei https://doaj.org/article/efc111cd81694827ab68106af9e532cf kostenfrei http://link.springer.com/article/10.1186/s13660-016-0962-y kostenfrei https://doaj.org/toc/1029-242X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2027 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 2016 1 7 |
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Abstract This paper discusses balls in partial b-metric spaces and cone metric spaces, respectively. Let ( X , p b ) $(X,p_{b})$ be a partial b-metric space in the sense of Mustafa et al. For the family △ of all p b $p_{b}$ -open balls in ( X , p b ) $(X,p_{b})$ , this paper proves that there are x , y ∈ B ∈ △ $x,y\in B\in\triangle$ such that B ′ ⊈ B $B'\nsubseteq B$ for all B ′ ∈ △ $B'\in\triangle$ , where B and B ′ $B'$ are with centers x and y, respectively. This result shows that △ is not a base of any topology on X, which shows that a proposition and a claim on partial b-metric spaces are not true. By some relations among ≪, <, and ≤ in cone metric spaces, this paper also constructs a cone metric space ( X , d ) $(X,d)$ and shows that { y ∈ X : d ( x , y ) ≪ ε } ‾ ≠ { y ∈ X : d ( x , y ) ≤ ε } $\overline{\{y\in X:d(x,y)\ll\varepsilon\}}\ne\{y\in X:d(x,y)\le\varepsilon\}$ in general, which corrects an error on cone metric spaces. However, it must be emphasized that these corrections do not affect the rest of the results in the relevant papers. |
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Abstract This paper discusses balls in partial b-metric spaces and cone metric spaces, respectively. Let ( X , p b ) $(X,p_{b})$ be a partial b-metric space in the sense of Mustafa et al. For the family △ of all p b $p_{b}$ -open balls in ( X , p b ) $(X,p_{b})$ , this paper proves that there are x , y ∈ B ∈ △ $x,y\in B\in\triangle$ such that B ′ ⊈ B $B'\nsubseteq B$ for all B ′ ∈ △ $B'\in\triangle$ , where B and B ′ $B'$ are with centers x and y, respectively. This result shows that △ is not a base of any topology on X, which shows that a proposition and a claim on partial b-metric spaces are not true. By some relations among ≪, <, and ≤ in cone metric spaces, this paper also constructs a cone metric space ( X , d ) $(X,d)$ and shows that { y ∈ X : d ( x , y ) ≪ ε } ‾ ≠ { y ∈ X : d ( x , y ) ≤ ε } $\overline{\{y\in X:d(x,y)\ll\varepsilon\}}\ne\{y\in X:d(x,y)\le\varepsilon\}$ in general, which corrects an error on cone metric spaces. However, it must be emphasized that these corrections do not affect the rest of the results in the relevant papers. |
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Abstract This paper discusses balls in partial b-metric spaces and cone metric spaces, respectively. Let ( X , p b ) $(X,p_{b})$ be a partial b-metric space in the sense of Mustafa et al. For the family △ of all p b $p_{b}$ -open balls in ( X , p b ) $(X,p_{b})$ , this paper proves that there are x , y ∈ B ∈ △ $x,y\in B\in\triangle$ such that B ′ ⊈ B $B'\nsubseteq B$ for all B ′ ∈ △ $B'\in\triangle$ , where B and B ′ $B'$ are with centers x and y, respectively. This result shows that △ is not a base of any topology on X, which shows that a proposition and a claim on partial b-metric spaces are not true. By some relations among ≪, <, and ≤ in cone metric spaces, this paper also constructs a cone metric space ( X , d ) $(X,d)$ and shows that { y ∈ X : d ( x , y ) ≪ ε } ‾ ≠ { y ∈ X : d ( x , y ) ≤ ε } $\overline{\{y\in X:d(x,y)\ll\varepsilon\}}\ne\{y\in X:d(x,y)\le\varepsilon\}$ in general, which corrects an error on cone metric spaces. However, it must be emphasized that these corrections do not affect the rest of the results in the relevant papers. |
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