@Article{Einstein:1932:RBE,
  author =       "Albert Einstein and Willem de Sitter",
  title =        "On the relation between the expansion and the mean
                 density of the universe",
  journal =      j-PROC-NATL-ACAD-SCI-USA,
  volume =       "18",
  number =       "3",
  pages =        "213--214",
  day =          "15",
  month =        mar,
  year =         "1932",
  CODEN =        "PNASA6",
  DOI =          "http://dx.doi.org/10.1073/pnas.18.3.213",
  ISSN =         "0027-8424 (print), 1091-6490 (electronic)",
  ISSN-L =       "0027-8424",
  bibdate =      "Sat Oct 28 08:28:24 2006",
  bibsource =    "http://www.math.utah.edu/pub/tex/bib/einstein.bib",
  URL =          "http://www.pnas.org/cgi/reprint/18/3/213.pdf",
  abbrjournal =  "Proc. Nat. Acad. Sci., Wash.",
  acknowledgement = ack-nhfb,
  Calaprice-number = "179",
  remark =       "The third paragraph of this article says:
                 ``Historically the term containing the `cosmological
                 constant' $ \lambda $ was introduced into the field
                 equations in order to enable us to account
                 theoretically for the existence of a finite mean
                 density in a static universe. It now appears that in
                 the dynamical case this end can be reached without the
                 introduction of $ \lambda $.'' The authors used a
                 lowercase Greek letter here, whereas its uppercase
                 companion is more common. Einstein had introduced that
                 constant into his field equations to permit a static
                 universe, as he then believed it to be. Hubble's later
                 experimental astronomical work gave clear evidence of
                 an expanding universe (subsequently found to be not
                 only expanding, but accelerating its expansion). Here,
                 the authors admit that the cosmological constant is not
                 needed.",
  Whittaker-number = "160",
}

{"_id":"hK6krXEAsxERJfQvT","bibbaseid":"einstein-desitter-ontherelationbetweentheexpansionandthemeandensityoftheuniverse-1932","downloads":0,"creationDate":"2016-10-24T03:41:55.492Z","title":"On the relation between the expansion and the mean density of the universe","author_short":["Einstein, A.","de Sitter, W."],"year":1932,"bibtype":"article","biburl":"https://bibbase.org/f/jtG5iWsgC6DYYZTQv/pub.bib","bibdata":{"bibtype":"article","type":"article","author":[{"firstnames":["Albert"],"propositions":[],"lastnames":["Einstein"],"suffixes":[]},{"firstnames":["Willem"],"propositions":["de"],"lastnames":["Sitter"],"suffixes":[]}],"title":"On the relation between the expansion and the mean density of the universe","journal":"Proceedings of the National Academy of Sciences of the United States of America","volume":"18","number":"3","pages":"213–214","day":"15","month":"March","year":"1932","coden":"PNASA6","doi":"http://dx.doi.org/10.1073/pnas.18.3.213","issn":"0027-8424 (print), 1091-6490 (electronic)","issn-l":"0027-8424","bibdate":"Sat Oct 28 08:28:24 2006","bibsource":"http://www.math.utah.edu/pub/tex/bib/einstein.bib","url":"http://www.pnas.org/cgi/reprint/18/3/213.pdf","abbrjournal":"Proc. Nat. Acad. Sci., Wash.","acknowledgement":"Nelson H. F. Beebe, University of Utah, Department of Mathematics, 110 LCB, 155 S 1400 E RM 233, Salt Lake City, UT 84112-0090, USA, Tel: +1 801 581 5254, FAX: +1 801 581 4148, e-mail: \\path|beebe@math.utah.edu|, \\path|beebe@acm.org|, \\path|beebe@computer.org| (Internet), URL: \\path|http://www.math.utah.edu/ beebe/|","calaprice-number":"179","remark":"The third paragraph of this article says: ``Historically the term containing the `cosmological constant' $ λ $ was introduced into the field equations in order to enable us to account theoretically for the existence of a finite mean density in a static universe. It now appears that in the dynamical case this end can be reached without the introduction of $ λ $.'' The authors used a lowercase Greek letter here, whereas its uppercase companion is more common. Einstein had introduced that constant into his field equations to permit a static universe, as he then believed it to be. Hubble's later experimental astronomical work gave clear evidence of an expanding universe (subsequently found to be not only expanding, but accelerating its expansion). Here, the authors admit that the cosmological constant is not needed.","whittaker-number":"160","bibtex":"@Article{Einstein:1932:RBE,\n author = \"Albert Einstein and Willem de Sitter\",\n title = \"On the relation between the expansion and the mean\n density of the universe\",\n journal = j-PROC-NATL-ACAD-SCI-USA,\n volume = \"18\",\n number = \"3\",\n pages = \"213--214\",\n day = \"15\",\n month = mar,\n year = \"1932\",\n CODEN = \"PNASA6\",\n DOI = \"http://dx.doi.org/10.1073/pnas.18.3.213\",\n ISSN = \"0027-8424 (print), 1091-6490 (electronic)\",\n ISSN-L = \"0027-8424\",\n bibdate = \"Sat Oct 28 08:28:24 2006\",\n bibsource = \"http://www.math.utah.edu/pub/tex/bib/einstein.bib\",\n URL = \"http://www.pnas.org/cgi/reprint/18/3/213.pdf\",\n abbrjournal = \"Proc. Nat. Acad. Sci., Wash.\",\n acknowledgement = ack-nhfb,\n Calaprice-number = \"179\",\n remark = \"The third paragraph of this article says:\n ``Historically the term containing the `cosmological\n constant' $ \\lambda $ was introduced into the field\n equations in order to enable us to account\n theoretically for the existence of a finite mean\n density in a static universe. It now appears that in\n the dynamical case this end can be reached without the\n introduction of $ \\lambda $.'' The authors used a\n lowercase Greek letter here, whereas its uppercase\n companion is more common. Einstein had introduced that\n constant into his field equations to permit a static\n universe, as he then believed it to be. Hubble's later\n experimental astronomical work gave clear evidence of\n an expanding universe (subsequently found to be not\n only expanding, but accelerating its expansion). 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