50 articles
Jean-Pierre Petit's personal page, astrophysicist, presenting his work and publications.
The animation created in 1992 by Frédéric Landsheat was rejected by several scientific journals.
An artifact is an accidental or artificial structure that appears during an experiment or observation. Numerical simulations constantly strive to avoid it.
The Epistémotron project is a tutorial designed to build an automatic scientific discovery generator.
Canadian Yan Bellavance launched a project called EPISTEMOTRON in 2004, aiming to develop ideas in astrophysics through distributed computing.
The document mentions a solar eruption triggered by a comet passing near the Sun, captured by a coronagraph.
Gravitational instability, or Jeans instability, is studied in the context of a sphere of dust with constant density.
The solar system is a planetary system that can be modeled in three-dimensional space. Many objects were ejected during its formation.
Work by Frédéric Baudemont on Newtonian and anti-Newtonian interactions on a sphere S2, with a simulation of a galaxy composed of 10,000 point masses.
Lithography is a printing technique using a lithographic stone, developed in the 19th century.
The author tried to contact Nicolas Hulot to discuss nuclear energy and neutronless fusion, but did not receive a response.
The operation of torpedoes depends on propeller or rocket propulsion, with speed limits due to water viscosity.
Tribute to Jacques Benveniste, an immunologist who conducted controversial experiments on high dilutions.
The article discusses the discovery of an implicit equation by Professor Tardy, called the 'Tardy bitoid'.
The text tells the story of the creation of a physical representation of the Boy's surface, made using copper wire.
Analysis of the periodic functions A(m) and B(m) on the Boy surface.
This document explains how to transform a Cross Cap surface into a Boy surface through the Steiner Roman surface.
The document explains how to transform a Cross Cap surface into a Boy surface via the Roman surface of Steiner.
The document explains how to transform a Cross Cap surface into a Boy surface through the Steiner Roman surface.
This document explains how to transform a Cross Cap surface into a Boy surface via the Roman Steiner surface.
The document explains how to transform a Cross Cap surface into a Boy surface by passing through the Steiner Roman surface.
The text explains the concept of 'sphere eversion' and the associated mathematical challenges.
This document explains how to transform a crosscap into a Boy's surface using the Roman surface of Steiner.
This text explains how to transform a crosscap into a Boy's surface through the Roman surface of Steiner.
The article explains the transformation of a crosscap into a Boy's surface through the Roman surface of Steiner.
This text explains how to transform a crosscap into a Boy's surface using the Roman surface of Steiner.
The text explains how to transform a crosscap into a Boy surface via the Roman surface of Steiner.
The text explains the turning inside out of a sphere and a cube, using polyhedral models.
This document explains the steps to download the Cosmo Player software.
The document explains how to use Cosmo Player to display objects in virtual reality.
The text presents an analytical representation of the Boy surface, an immersion of the projective plane in R3.
The document presents virtual reality images and explains how to download and use Cosmo Player.
The 'Boy-cube' is an improved version of the Boy surface.
The Boy surface is a mathematical representation of the 2-dimensional projective space.
The page presents a polyhedral version of an object that can be constructed from cardboard.
The Crosscap is a surface related to the projective plane and has two cuspidal points.
The Klein bottle is a complex mathematical object, represented here in an unusual form.
The lacteal surface is a mathematical surface first described in 1956 by Grossman.
The text presents a central model of the cube inversion, created by J.P. Petit in 1991.
The central model of the cube inversion is presented, with imagery from C.TARDY.
The object is a variation of the Möbius strip with three half-twists.
The Möbius strip is a simple yet fascinating object, created by giving a belt a half-twist.
The monohedron is a polyhedron composed of a single face and a single edge.
The page explains the Steiner and the 'Steiner cube'.