European historical evidence of the supernova of AD 1054 coins of Constantine IX and SN 1054We investigate a possible depiction of the famous SN 1054 event in specially minted coins produced in the Eastern Roman Empire in 1054 A.D. On these coins, we investigate if the head of the Emperor,…Miroslav D. Filipović, Jeffrey L. Payne, Thomas Jarret et al.·Jun 1, 2022SaveLearn
Absorbing the Arrow of Electromagnetic RadiationWe argue that the asymmetry between diverging and converging electromagnetic waves is just one of many asymmetries in observed phenomena that can be explained by a past hypothesis and statistical…Mario Hubert, Charles T. Sebens·May 27, 2022SaveLearn
Point-Dimension Theory (Part I): The Point-Extended Box DimensionThis article is an introductory work to a larger research project devoted to pure, applied and philosophical aspects of dimension theory. It concerns a novel approach toward an alternate dimension…Nadir Maaroufi, El Hassan Zerouali·May 27, 2022SaveLearn
The Anthropic Principle Is Testable And Appears WeakThe Anthropic Principle has been with us since the 1970s. This Principle is advanced to account for the "fine tuning" of the 25 constants of the Standard Model of Particle Physics. Were these…Stuart Kauffman·May 25, 2022SaveLearn
A Role for the Fauxrizon in the Semiclassical Limit of a FuzzballRecent work on the status of astrophysical modeling in the wake of quantum gravity indicates that a 'fauxrizon' (portmanteau of 'faux horizon'), such as is relevant to understanding astrophysical…Mike D. Schneider·May 23, 2022SaveLearn
Trans-Planckian Philosophy of CosmologyI provide some philosophical groundwork for the recently proposed 'trans-Planckian censorship' conjecture in theoretical physics. In particular, I argue that structure formation in early universe…Mike D. Schneider·May 23, 2022SaveLearn
The open past in an indeterministic physicsDiscussions on indeterminism in physics focus on the possibility of an open future, i.e. the possibility of having potential alternative future events, the realisation of one of which is not fully…Flavio Del Santo, Nicolas Gisin·May 23, 2022SaveLearn
Are Physical Theories Incommensurable?This paper examines the incommensurability thesis - one of the most important and controversial ideas to emerge from the simultaneous work of Kuhn and Feyerabend. In the first half, I discuss three…Kharanshu Solanki·May 21, 2022SaveLearn
Is There a 4th Law for Non-Ergodic Systems That Do Work To Construct Their Expanding Phase Space?Substantial grounds exist to doubt the universal validity of the Newtonian Paradigm that requires a pre-stated, fixed phase space. Therefore, the Second Law of Thermodynamics, stated only for fixed…Stuart Kauffman·May 19, 2022SaveLearn
The Pragmatic QFT Measurement Problem and the need for a Heisenberg-like Cut in QFTDespite quantum theory's remarkable success, many philosophers worry that it nonetheless lacks some crucial connection between theory and experiment. One under-discussed aspect of the Quantum…Daniel Grimmer·May 19, 2022SaveLearn
Randomness in Relational Quantum MechanicsThe relational interpretation of quantum mechanics (RQM), introduced in its present form by Carlo Rovelli in 1996, involves a number of significant departures from other QM interpretations widely…Gary Gordon·May 17, 2022SaveLearn
The logic of planetary combination in Vettius ValensThe Anthologies of the second-century astrologer Vettius Valens (120-c.175 CE) is the most extensive surviving practical astrological text from the period. Despite this, the theoretical underpinnings…Claire Hall, Liam P. Shaw·May 16, 2022SaveLearn
The Duality of Whittaker Potential Theory: Fundamental Representations of Electromagnetism and Gravity, and Their OrthogonalityE. T. Whittaker produced two papers in 1903 and 1904 that, although sometimes considered mere mathematical statements (Barrett, 1993), held important implications for physical theory. The Whittaker…Mark Titleman·May 13, 2022SaveLearn
Holography, Application, and String Theory's Changing NatureBased on string theory's framework, the gauge/gravity duality, also known as holography, has the ability to solve practical problems in low energy physical systems like metals and fluids. Holographic…Lauren Greenspan·May 10, 2022SaveLearn
Is there a universal concept of mass in fundamental physics?The concept of mass was introduced as a mathematical abstraction and unifying principle in physics by Newton in the 17th century, and calibrated on a Solar System scale by Cavendish at the end of the…Robert A. Wilson·May 10, 2022SaveLearn
How and When Did Locality Become 'Local Realism'? A Historical and Critical Analysis (1963-1978)The history of the debates on the foundational implications of the Bell non-locality theorem displayed very soon a tendency to put the theorem in a perspective that was not entirely motivated by its…Federico Laudisa·May 9, 2022SaveLearn
Einstein's Oxford Blackboard: A Unique Historical ArtefactEinstein's blackboard is a well-known exhibit at the History of Science Museum at Oxford University. However, it is much less well known that the writing on the board provides a neat summary of a…Cormac O'Raifeartaigh·May 5, 2022SaveLearn
Introduction \`a l'oeuvre de S. Kichenassamy en Physique Th\'eoriqueThe work of S. Kichenassamy (1926-2015) in Theoretical and Mathematical Physics covers the spectrum of Relativistic Physics: from the clarification of the postulational basis of the two theories of…Satyanad Kichenassamy·May 4, 2022SaveLearn
Penrose's 1965 singularity theorem: From geodesic incompleteness to cosmic censorshipSupplementing earlier literature by e.g. Tipler, Clarke, & Ellis (1980), Israel (1987), Thorne, (1994), Earman (1999), Senovilla & Garfinkle (2015), Curiel (2019ab), and Landsman (2021ab), I provide…Klaas Landsman·May 3, 2022SaveLearn
The orientation of Jesuit churches in the Chiquitos missions of eastern BoliviaThe Jesuit missions in South America were an important and unique advance in Christian evangelisation on the continent until the expulsion of the Order in 1767. Although the history and cultural…Alejandro Gangui·May 1, 2022SaveLearn
On Automorphism Criteria for Comparing Amounts of Mathematical StructureWilhelm (2021) has recently defended a criterion for comparing structure of mathematical objects, which he calls Subgroup. He argues that Subgroup is better than SYM * , another widely adopted…Thomas William Barrett, JB Manchak, James Owen Weatherall·Apr 25, 2022SaveLearn
Sometimes size does not matterCosmological fine-tuning has traditionally been associated with the narrowness of the intervals in which the parameters of the physical models must be located to make life possible. A more thorough…Daniel Andrés Díaz-Pachón, Ola Hössjer, Robert J. Marks·Apr 25, 2022SaveLearn
How Friedmann Shod EinsteinExactly one hundred years ago, in May 1922, Alexander Friedmann discovered that General Relativity (GR) predicts non-stationary Universe. His equation describing the evolution of the Universe is now…Vladimir O. Soloviev·Apr 22, 2022SaveLearn
On alleged discovery of satellites of Jupiter by Simon Mayr (Marius)In 1614, the German astronomer Simon Mayr published his claim to have discovered the satellites of Jupiter. Writing in the treatise Mundus Jovialis, Mayr made his assertion in a convoluted but…Gabriele Vanin·Apr 21, 2022SaveLearn
Biocosmology: Biology from a cosmological perspectiveThe Universe contains everything that exists, including life. And all that exists, including life, obeys universal physical laws. Do those laws then give adequate foundations for a complete…Marina Cortês, Stuart A. Kauffman, Andrew R. Liddle et al.·Apr 20, 2022SaveLearn