{"id":3009,"date":"2026-04-09T22:56:07","date_gmt":"2026-04-09T14:56:07","guid":{"rendered":"https:\/\/iweb20wp-b205b.url.tku.edu.tw\/jase\/?post_type=tkuisotope&#038;p=3009"},"modified":"2026-06-08T20:47:47","modified_gmt":"2026-06-08T12:47:47","slug":"cosmological-constant-as-hyper-geometric-function-in-fivedimensional-space-time","status":"publish","type":"tkuisotope","link":"\/jase\/?tkuisotope=cosmological-constant-as-hyper-geometric-function-in-fivedimensional-space-time","title":{"rendered":"Cosmological constant as Hyper Geometric function in fivedimensional space-time"},"content":{"rendered":"\n<div class=\"wp-block-tkuwpbs5-bs5-row row article-info\">\n<div class=\"wp-block-tkuwpbs5-bs5-column col-md-3 align-self-start\">\n<p><i class=\"fa fa-folder\" aria-hidden=\"true\"><\/i>&nbsp;<a href=\"\/jase\/?page_id=2961\" data-type=\"page\" data-id=\"807\">2024<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-tkuwpbs5-bs5-column col-md-3 align-self-start\">\n<p><i class=\"fa fa-folder-open\" aria-hidden=\"true\"><\/i>&nbsp;<a href=\"\/jase\/?page_id=2966\" data-type=\"page\" data-id=\"1055\">Volume 27, Issue 1<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-tkuwpbs5-bs5-column col-md-6 align-self-start\">\n<div class=\"wp-block-tkuwpbs5-bs5-div dv_publish\" data-aos=\"normal\"><div class=\"wp-block-post-date\"><time datetime=\"2026-04-09T22:56:07+08:00\">2026-04-09<\/time><\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-tkuwpbs5-bs5-row row\">\n<div class=\"wp-block-tkuwpbs5-bs5-column col-md-5 align-self-start\">\n<div class=\"wp-block-tkuwpbs5-bs5-div au-ol\" data-aos=\"normal\">\n<p>Satish T. Rathod and Kalpana Pawar<a href=\"mailto:drkalpanapawar75@gmail.com\"><i class=\"fa fa-envelope\"><\/i><\/a><\/p>\n\n\n\n<p style=\"font-size:14px\">Department of Mathematics, Shri R. R. Lahoti Science College, Morshi-444905, Dist. Amravati, M. S., India<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-tkuwpbs5-bs5-div\" style=\"margin-top:var(--wp--preset--spacing--40)\" data-aos=\"normal\">\n<p>Received:\u00a0January 11, 2023<br>Accepted:\u00a0March 1, 2023<br>Publication Date:\u00a0April 9, 2026<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-tkuwpbs5-bs5-column col-md-7 align-self-start clk=\u5716\u7247\"><img decoding=\"async\" src=\"\/jase\/wp-content\/uploads\/2026\/03\/article_image.jpg\" class=\"img-fluid img-fluid mx-auto d-block\" alt=\"\u4e0a\u50b3\u5716\u7247\">\n\n\n<p class=\"has-text-align-center img_caption\">No figure<\/p>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-small-font-size\"><i class=\"fab fa-creative-commons\"><\/i>&nbsp;<strong>Copyright&nbsp;<\/strong>The Author(s). This is an open access article distributed under the terms of the&nbsp;<a rel=\"noreferrer noopener\" href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\" target=\"_blank\">Creative Commons Attribution&nbsp;License (CC BY 4.0)<\/a>, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.<\/p>\n\n\n\n<p>Download Citation:\u00a0 <a rel=\"noreferrer noopener\" href=\"\/jase\/wp-content\/uploads\/2026\/01\/jase-202509-28-09-0006.pdf\" data-type=\"link\" data-id=\"\/jase\/wp-content\/uploads\/2026\/01\/jase-202509-28-09-0006.pdf\" target=\"_blank\">BibTeX <\/a>| <a href=\"http:\/\/dx.doi.org\/10.6180\/jase.202401_27(1).0012\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/dx.doi.org\/10.6180\/jase.202401_27(1).0012<\/a>\u00a0\u00a0<\/p>\n\n\n\n<p class=\"btn btn-primary article-btn\"><a href=\"\/jase\/wp-content\/uploads\/2026\/04\/12_2022_1205_V27i1.pdf\" data-type=\"attachment\" data-id=\"2995\" target=\"_blank\" rel=\"noreferrer noopener\">Download PDF<\/a><\/p>\n\n\n\n<div style=\"height:24px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>In this paper, we have studied the Einstein Field equation in Kaluza-Klein space-time in five dimension with the metric dS<sup>2<\/sup> = dt<sup>2<\/sup> \u2212 A<sup>2<\/sup> (dx<sup>2<\/sup> + dy<sup>2<\/sup> + dz<sup>2<\/sup>) \u2212 B<sup>2<\/sup>d\u03c8<sup>2<\/sup> under the assumption that B = \u03b1t, where \u03b1 = Constant and scale factor satisfying the relation R<sup>4<\/sup> = A<sup>3<\/sup>B with perfect fluid having energy momentum tensor T<sub>ij<\/sub> = (\u03c1 + p)v<sub>i<\/sub>v<sub>j<\/sub> \u2212 pg<sub>ij<\/sub><br>In this paper, we have assumed that G = 1\/t and we have found the value of cosmological constant \u039b is a function time t in terms of hyper geometric function.<\/p>\n\n\n\n<p><em>Keywords:\u00a0Kaluza-Klein space-time in five-dimension, perfect fluid, Hypergeometric Function, variable cosmological constant \u039b = \u039b(t) and gravitational constant G = G(t)<\/em><\/p>\n\n\n\n<div style=\"height:2rem\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-tkuwpbs5-bs5-div ref_ol\" data-aos=\"normal\">\n<ol>\n<li>[1] T. Kaluza, (1921) \u201cSitzungsber&#8221; Abhandlungen der K\u00f6niglich Preussischen Akademie der Wissenschaften 996: 1921.<\/li>\n<li>[2] O. Klein. \u201cQUANTUM THEORY AND FIVEDIMENSIONAL RELATIVITY THEORY\u201d. In: The Oskar Klein Memorial Lectures, 67\u201380. DOI: 10.1142\/9789814368728_0006. eprint: https:\/\/www.worldscientific.com\/doi\/pdf\/10.1142\/9789814368728_0006.<\/li>\n<li>[3] F. R. MILLER and N. B. LAUGHTON, (1926) \u201cThe R\u00f4le of the Cerebellum in the Co-ordination of Animal Movement&#8221; Nature 118(2971): 516\u2013517. DOI: 10.1038\/118516b0.<\/li>\n<li>[4] P. G. Freund, (1982) \u201cKaluza-Klein cosmologies&#8221; Nuclear Physics B 209(1): 146\u2013156. DOI: https:\/\/doi.org\/10.1016\/0550-3213(82)90106-7.<\/li>\n<li>[5] T. Dereli and R. Tucker, (1983) \u201cDynamical reduction of internal dimensions in the early universe&#8221; Physics Letters B 125(2): 133\u2013135. DOI: https:\/\/doi.org\/10.1016\/0370-2693(83)91252-2.<\/li>\n<li>[6] E. Alvarez and M. B. Gavela, (1983) \u201cEntropy from Extra Dimensions&#8221; Phys. Rev. Lett. 51: 931\u2013934. DOI: 10.1103\/PhysRevLett.51.931.<\/li>\n<li>[7] R. Bergamini and C. A. Orzalesi, (1984) \u201cTowards a cosmology for multidimensional unified theories&#8221; Physics Letters B 135(1): 38\u201342. DOI: https:\/\/doi.org\/10.1016\/0370-2693(84)90449-0.<\/li>\n<li>[8] S. Randjbar-Daemi, A. Salam, and J. Strathdee, (1984) \u201cOn Kaluza-Klein cosmology&#8221; Physics Letters B 135(5): 388\u2013392. DOI: https:\/\/doi.org\/10.1016\/0370-2693(84)90300-9.<\/li>\n<li>[9] A. Chodos and S. Detweiler, (1980) \u201cWhere has the fifth dimension gone?&#8221; Phys. Rev. D 21: 2167\u20132170. DOI: 10.1103\/PhysRevD.21.2167.<\/li>\n<li>[10] P. A. M. DIRAC, (1937) \u201cThe Cosmological Constants&#8221; Nature 139(3512): 323. DOI: 10.1038\/139323a0.<\/li>\n<li>[11] S. Oli, (2014) \u201cFive-Dimensional Space-Times with a Variable Gravitational and Cosmological Constant&#8221; Journal of Gravity 2014: 874739. DOI: 10.1155\/2014\/874739.<\/li>\n<li>[12] R. K. Tiwari, F. Rahaman, and S. Ray, (2010) \u201cFive Dimensional Cosmological Models in General Relativity&#8221; International Journal of Theoretical Physics 49(10): 2348\u20132357. DOI: 10.1007\/s10773-010-0421-3.<\/li>\n<li>[13] S. T. Rathod and K. Pawar, (2007) \u201cFive-Dimensional Cosmological Model in presence of Perfect Fluid with G is proportional to t \u22121&#8243; Romanian Journal of Physics 52: 445.<\/li>\n<\/ol>\n<\/div>\n\n\n\n<p><\/p>\n","protected":false},"author":3,"template":"wp-custom-template-detail-4-aricles","meta":{"_uag_custom_page_level_css":""},"categories":[10,6,515],"tags":[538],"acf":[],"uagb_featured_image_src":[],"uagb_author_info":{"display_name":"\u6797\u923a\u6db5","author_link":"\/jase\/?author=3"},"uagb_comment_info":0,"uagb_excerpt":"&nbsp;Copyright&nbsp;The Author(s). This is an open access article distributed under the terms of the&nbsp;Creative Commons Attribution&nbsp;License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited. Download Citation:\u00a0 BibTeX | http:\/\/dx.doi.org\/10.6180\/jase.202401_27(1).0012\u00a0\u00a0 Download PDF In this paper, we have studied the Einstein Field equation in&hellip;","_links":{"self":[{"href":"\/jase\/index.php?rest_route=\/wp\/v2\/tkuisotope\/3009"}],"collection":[{"href":"\/jase\/index.php?rest_route=\/wp\/v2\/tkuisotope"}],"about":[{"href":"\/jase\/index.php?rest_route=\/wp\/v2\/types\/tkuisotope"}],"author":[{"embeddable":true,"href":"\/jase\/index.php?rest_route=\/wp\/v2\/users\/3"}],"wp:attachment":[{"href":"\/jase\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3009"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"\/jase\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3009"},{"taxonomy":"post_tag","embeddable":true,"href":"\/jase\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3009"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}