Causal Loops in Time Travel
About the possibility of time traveling based on several specialized works, including those of Nicholas J. J. Smith (“Time Travel“), William Grey (”Troubles with Time Travel”), Ulrich Meyer (”Explaining causal loops”), Simon Keller and Michael Nelson (”Presentists should believe in … Read More
Gravitational Singularities
Index Academic, Volumul I, 2025 Gravitational singularities in general relativity are spacetime locations where the gravitational field becomes infinite. Scalar invariant curves of spacetime include a measure of matter density. Some physicists and philosophers believe that because the density of … Read More
Paradoxes of causal loops in spacetime
There is, among some scientists and philosophers, the idea that any theory that would allow the time travel would introduce causal issues. These types of temporal paradoxes can be avoided by the Novikov self-consistency principle or by a variation in … Read More
The Ontology of General Relativity
General Relativity generated various early philosophical interpretations. His adherents have highlighted the “relativization of inertia” and the concept of simultaneity, Kantians and Neo-Kantians have underlined the approach of certain synthetic “intellectual forms” (especially the principle of general covariance, and logical … Read More
Physics Help
The book is an overview of the major subfields and concepts in physics, including a brief outline of the history of physics and its subfields. Physics (from Greek from φυσικός (phusikos): natural, from φύσις (fysis): Nature) is the science of … Read More
Classical theory of singularities
The singularities from the general relativity resulting by solving Einstein’s equations were and still are the subject of many scientific debates: Are there singularities in spacetime, or not? Big Bang was an initial singularity? If singularities exist, what is their … Read More
Hooke’s claim on the law of gravity
Based on Galileo’s experiments, Newton develops the theory of gravity in his first book Philosophiæ Naturalis Principia Mathematica (“Principia“) of 1686. Immediately after, Robert Hooke accused Newton of plagiarism, claiming that he unduly assumed his “notion” of “the rule of … Read More
Newton’s action at a distance – Different views
Different authors have attempted to clarify the aspects of remote action and God’s involvement on the basis of textual investigations, mainly from the Mathematical Principles of Natural Philosophy, Newton’s correspondence with Richard Bentley (1692/93), and Queries that Newton introduced at … Read More
The singularities as ontological limits of the general relativity
The singularities from the general relativity resulting by solving Einstein’s equations were and still are the subject of many scientific debates: Are there singularities in spacetime, or not? Big Bang was an initial singularity? If singularities exist, what is their … Read More
Time Travel
Time travel is a recognized concept in philosophy and science, but whose scope is highly disputed, giving rise to numerous paradoxes in both philosophy and science. Time travel is considered by some accepted both in general relativity and quantum mechanics, … Read More