Download 2012 and the End of the World: The Western Roots of the Maya by Matthew Restall, Amara Solari PDF

By Matthew Restall, Amara Solari

Did the Maya relatively expect that the area could lead to December of 2012? If no longer, how and why has 2012 millenarianism won such renowned attraction? during this deeply a professional booklet, major historians of the Maya solution those questions in a succinct, readable, and obtainable variety. Matthew Restall and Amara Solari introduce, clarify, and eventually demystify the 2012 phenomenon. they start by way of in brief studying the proof for the prediction of the world's lead to historical Maya texts and photographs, reading accurately what Maya clergymen did and didn't prophesize. The authors then convincingly convey how 2012 millenarianism has roots a long way in time and position from Maya cultural traditions, yet in these of medieval and Early sleek Western Europe. Revelatory any myth-busting, whereas closing firmly grounded in ancient truth, this interesting booklet can be crucial interpreting because the countdown to December 21, 2012, starts off.

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The weak-field equations can be further simplified if we now make a restriction to slowly moving sources and work to first order only in the source velocity: for a classical source p ρc2 , so that only T 00 is significantly non-zero, and all diagonal μν ¯ components of h except the (0, 0) component may therefore be treated as zero. Since hμν = ¯hμν − 12 η μν ¯h (¯h = −h as ημμ = 4), we see that all diagonal components of hμν are identical and equal to ¯h00 /2, and the off-diagonal components are zero except for h0i .

In general relativity, the Lagrangian density is just proportional to the Ricci scalar, as derived by Hilbert: R . 91) 16πG Field equations that are valid from the point of view of general covariance require only that the Lagrangian is a scalar, so that higher powers of R could be added, as well as powers of more complicated scalars that can be formed from the Ricci tensor (R μν Rμν ). Any such terms must not interfere with the Newtonian limit of the theory, but this can always be arranged by adding in the extra terms with a small enough coefficient.

C The third sign above is related to the choice of convention for the Ricci tensor: α . 79) With these definitions, Misner, Thorne & Wheeler (unsurprisingly) classify themselves as (+ + +), whereas Weinberg (1972) is (+ − −). Peebles (1980, 1993) and Efstathiou (1990) are (−++). This book is (−+−), as are Rindler (1977), Atwater (1974), Narlikar & Padmanabhan (1986), Collins, Martin & Squires (1989). The justification for any of these conventions lies in ease of memory and use of the formulae, which may depend on the application.

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