Search results
Results from the WOW.Com Content Network
The Borde–Guth–Vilenkin (BGV) theorem is a theorem in physical cosmology which deduces that any universe that has, on average, been expanding throughout its history cannot be infinite in the past but must have a past spacetime boundary. [1]
The Borde–Guth–Vilenkin theorem, according to which any universe that has, on average, been expanding throughout its history cannot have been expanding indefinitely but must have had a past boundary at which inflation began. [45] Professor Alexander Vilenkin, one of the authors of the Borde–Guth–Vilenkin theorem, writes: [46]
In 1982, Paul Steinhardt presented the first model of eternal inflation, Vilenkin showed that eternal inflation is generic. [9] Furthermore, working with Arvind Borde and Alan Guth, he developed the Borde–Guth–Vilenkin theorem, showing that a period of inflation must have a beginning and that a period of time must precede it. [10]
Guth described the inflationary universe as the "ultimate free lunch": [108] [109] new universes, similar to our own, are continually produced in a vast inflating background. Gravitational interactions, in this case, circumvent (but do not violate) the first law of thermodynamics ( energy conservation ) and the second law of thermodynamics ...
Alan Harvey Guth (/ ɡ uː θ /; born February 27, 1947) is an American theoretical physicist and cosmologist who is the Victor Weisskopf Professor of Physics at the Massachusetts Institute of Technology.
1 Vilenkin sources. 1 comment. ... 3 Plain English. 1 comment. 4 New arxiv. 2 comments. Toggle the table of contents. Talk: Borde–Guth–Vilenkin theorem. Add ...
Tegmark claims that the hypothesis has no free parameters and is not observationally ruled out. Thus, he reasons, it is preferred over other theories-of-everything by Occam's Razor . Tegmark also considers augmenting the MUH with a second assumption, the computable universe hypothesis ( CUH ), which says that the mathematical structure that is ...
Jean Louis, baron Bourgain (French:; () 28 February 1954 – () 22 December 2018) was a Belgian mathematician. He was awarded the Fields Medal in 1994 in recognition of his work on several core topics of mathematical analysis such as the geometry of Banach spaces, harmonic analysis, ergodic theory and nonlinear partial differential equations from mathematical physics.