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The present discussion contribution is some remarks concerning and review of the proposal by one of us (C. Balazs) to explain the cosmological constant by a/the principle of entropy. Used without further comment this principle of entropy…

宇宙学与河外天体物理 · 物理学 2013-06-26 H. B. Nielsen , C. Balazs

A new cosmological model leads to testable predictions that are different from those of both standard cosmology and models with a cosmological constant. The prediction that q_0=0 is the same as in other ``coasting universe'' models, but…

高能物理 - 理论 · 物理学 2007-05-23 R. E. Allen , J. Dumoit , A. Mondragon

This article presents a clear proof of the Riemann Mapping Theorem via Riemann's method, uncompromised by any appeals to topological intuition.

复变函数 · 数学 2016-12-14 Robert E. Greene , Kang-Tae Kim

Mathematical theorems are human knowledge able to be accumulated in the form of symbolic representation, and proving theorems has been considered intelligent behavior. Based on the BHK interpretation and the Curry-Howard isomorphism, proof…

神经与进化计算 · 计算机科学 2016-04-18 Li-An Yang , Jui-Pin Liu , Chao-Hong Chen , Ying-ping Chen

We provide a consistency relation between cosmological observables in general relativity with the cosmological constant. Breaking of this relation at any redshift would imply the breakdown of the hypothesis of the cosmological constant as…

天体物理学 · 物理学 2009-06-23 Takeshi Chiba , Takashi Nakamura

Cosmology today is confronted with several seemingly insoluble puzzles and strange, inexplicable coincidences. But a careful re-examination of the Cosmological principle and the Weyl postulate, foundational elements in this subject,…

科普物理 · 物理学 2018-09-26 Fulvio Melia

Contents: Introduction. The Present State of the Universe. What Can We Expect From a Complete Cosmological Theory? An Overview of Quantum Effects in Cosmology. Parametric (Superadiabatic) Amplification of Classical Waves. Graviton Creation…

广义相对论与量子宇宙学 · 物理学 2010-04-06 L. P. Grishchuk

In this paper we propose that cosmological time is a quantum observable that does not commute with other quantum operators essential for the definition of cosmological states, notably the cosmological constant. This is inspired by…

广义相对论与量子宇宙学 · 物理学 2020-02-11 Joao Magueijo , Lee Smolin

The discovery of cosmic acceleration is one of the most important developments in modern cosmology. The observation, thirteen years ago, that type Ia supernovae appear dimmer that they would have been in a decelerating universe followed by…

宇宙学与河外天体物理 · 物理学 2015-06-04 Pierre Astier , Reynald Pain

The present paper seeks to construct a quantum theory of the cosmological constant in which its presently observed very small value emerges naturally.

广义相对论与量子宇宙学 · 物理学 2007-06-13 Budh Ram

Witten has presented an argument for the vanishing of the cosmological constant in 2+1 dimensions. This argument is crucially tied to the specific properties of (2+1)-dimensional gravity. We argue that this reasoning can be deconstructed to…

高能物理 - 理论 · 物理学 2010-04-05 Vishnu Jejjala , Robert G. Leigh , Djordje Minic

I present and discuss a puzzle about wizards invented by John H. Conway.

历史与综述 · 数学 2012-10-22 Tanya Khovanova

We discuss how to extract information about the cosmological constant from the Wheeler-DeWitt equation, considered as an eigenvalue of a Sturm-Liouville problem. The equation is approximated to one loop with the help of a variational…

广义相对论与量子宇宙学 · 物理学 2011-08-17 Remo Garattini

This presentation reports on first evidence for a low-mass-density/positive-cosmological-constant universe that will expand forever, based on observations of a set of 40 high-redshift supernovae. The experimental strategy, data sets, and…

A phenomenological formalism is presented in which the apparent acceleration of the universe is generated by cosmic structure formation, without resort to Dark Energy, modifications to gravity, or a local void. The observed acceleration…

宇宙学与河外天体物理 · 物理学 2015-06-05 Brett Bochner

John Bell taught us that quantum mechanics can not be reproduced by non-contextual and local Hidden variable theory. The impossibility of replacing quantum mechanics by non-contextual Hidden Variable Theory can be turned to a impossible…

量子物理 · 物理学 2007-05-23 Guruprasad Kar

A new hidden variable theory is proposed, according to which particles follows definite trajectories, as in Bohmian Mechanics or Nelson's stochastic mechanics; in the new theory, however, the trajectories are classical, i.e. Newtonian. This…

量子物理 · 物理学 2007-05-23 Bruno Galvan

This is a talk given at the conference ``Critical Dialogues in Cosmology'' at Princeton University, June 24-- 27, 1996. It gives a brief summary of our present theoretical understanding regarding the value of the cosmological constant, and…

天体物理学 · 物理学 2016-08-30 Steven Weinberg

We offer a new proof (and review some known proofs) of Cantor's Powerset Theorem (1891), which concerns the non-existence of a surjective function from a set onto its powerset.

逻辑 · 数学 2025-10-17 Saeed Salehi

In this paper, using a significantly improved version of the model-independent, cosmographic approach to cosmology (John, M. V. 2004, ApJ, 614, 1), we address an important question: Was there a decelerating past for the universe? To answer…

天体物理学 · 物理学 2009-11-11 Moncy V. John