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11 godz. temu · The recent progress on low-dimensional holography [1,2,3] and the black hole information paradox [4, 5] have brought challenges to the standard AdS/CFT correspondence.As an example, in the derivation of the so-called island formula [6,7,8], wormhole geometries connecting different asymptotic boundaries and higher genus geometries were introduced in the Euclidean path integral [4, 5, 9].
11 godz. temu · The number π (/ p aɪ /; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159.The number π appears in many formulae across mathematics and physics.It is an irrational number, meaning that it cannot be expressed exactly as a ratio of two integers, although fractions such as are commonly used to ...
11 godz. temu · For a Tycho SNR distance of 2.5 kpc, 1 arcsec is ∼ 4 ·1016 cm. The Chandra PSF radius at the ridge is ∼2.5 arcsec so an upper value for dbelow which the intensity profile only weakly depends ondis ∼1017 cm. For the X-ray intensity profiles shown in Fig. 8, only the L 0 = 3 ·1014 cm case has d≈1.6 ·1017 cm that exceeds the Chandra PSF ...
1 dzień temu · Definition. Consider a matrix A and a nonzero vector .If applying A to (denoted by ) simply scales by a factor of λ, where λ is a scalar, then is an eigenvector of A, and λ is the corresponding eigenvalue. This relationship can be expressed as: =. There is a direct correspondence between n-by-n square matrices and linear transformations from an n-dimensional vector space into itself, given ...
11 godz. temu · Eur J Nucl Med Mol Imaging (2011) 38 (Suppl 2):S260–S441 DOI 10.1007/s00259-011-1911-0POSTER PRESENTATIONSP02 — Sunday, October 16, 2011, 16:00 — 16:30, , NIA Exhibition AreaPhysics & Instrumentation & Data Analysis: Image P01 — Sunday, October 16, 2011, 16:00 — 16:30, NIA Exhibition AreaPhysics&Ins...
