(more unsolved problems in physics) In cosmology, the cosmological constant problem or vacuum catastrophe is the substantial disagreement between the observed...

the constant problem is the problem of deciding whether a given expression is equal to zero. This problem is also referred to as the identity problem or...

cosmological constant. The explanation of this small but positive value is a remaining theoretical challenge, the so-called cosmological constant problem. Some...

thus obtained is referred to as the sofa constant. The exact value of the sofa constant is an open problem. The leading solution, by Joseph L. Gerver...

{\displaystyle G} is the gravitational constant. This is a set of nine second-order differential equations. The problem can also be stated equivalently in...

than gravity. A hierarchy problem occurs when the fundamental value of some physical parameter, such as a coupling constant or a mass, in some Lagrangian...

Unsolved problem in mathematics: What is the minimum volume among all shapes of the same constant width? (more unsolved problems in mathematics) In geometry...

vacua, the problem of finding one with a sufficiently small cosmological constant is NP complete. This is a version of the subset sum problem. A possible...

quantum vacuum. Unsolved problem in physics: Why does the zero-point energy of the vacuum not cause a large cosmological constant? What cancels it out? (more...

(2007). Sinks in the landscape, Boltzmann brains and the cosmological constant problem. Journal of Cosmology and Astroparticle Physics, 2007(01), 022. Sean...