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cosmological constant

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Noun1.cosmological constant - an arbitrary constant in the equations of general relativity theory
constant - a number representing a quantity assumed to have a fixed value in a specified mathematical context; "the velocity of light is a constant"
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An Einstein equation without any cosmological constant is given by S(X,Y)-[1/2]rg(X,Y) = KT(X,Y) = G(X,Y), [for all]X,Y[member of]TM, (7) where r is the scalar curvature at any point of the space time and K is the gravitational constant [6].
Space time with generalized covariant recurrent energy momentum tensor by Bhattacharyya, A.; De, T.; Debnath, D. / Tamsui Oxford Journal of Mathematical Sciences
The theory is one of those that attribute dark energy to an entirely new field dubbed quintessence that plays the role of the cosmological constant, a term that Albert Einstein added to the theory of general relativity to keep the universe from contracting under the force of gravity.
The day the Universe froze by Asian News International
The research differed from previous studies on supernovas, which are the explosive deaths of massive stars, and provided the "strongest evidence yet that dark energy is the cosmological constant," he said, similar to the energy of empty space.
'Dark energy' expands, contracts universe: researchers by AFP / AFP Global Edition
 
 
 
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