THE BIRD OF THE GOOD GOD

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From my hole, I had followed this scene, not without a secret satisfaction to see this misadventure melt on a persecutor of the little birds; but this first movement of vengeance passed, I began to think and realized that my … Read More

Henri Poincaré, Quanta hypothesis: Quanta of energy

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The explanation of these phenomena must be sought without making a clean sweep of the principles of Thermodynamics; above all, we must admit the possibility of statistical equilibrium, otherwise nothing would remain of Carnot’s principle; we cannot admit, in Thermodynamics, … Read More

Gravity and gravitational tests

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Gravity has a universal character, but its strength rapidly decreases with distance, being the weakest of the four fundamental forces of physics[1]. In the 4th century BC, the Greek philosopher Aristotle considered as the cause of the fall of heavy … Read More

THE ELECTION OF THE KING OF BIRDS

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No animal, no being and no creature Who does not have its opposite: it is the law of nature. To look for the reason, they are superfluous care. God did well what he did, and I do not know more … Read More

Henri Poincaré, Quanta hypothesis: The law of radiation

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Physicists did not at first concern themselves with these difficulties, but two new facts changed the face of things; the first is what is called the law of black radiation. A perfectly black body is one whose absorption coefficient is … Read More

MY FIRST FRIEND

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Surrounding wheat mature before sapling Was still strong enough To fly and take flight, A thousand different cares the agitated lark Go for pasture, warn his children To always be on the look-out and to be sentinel … (La Fontaine) … Read More

Henri Poincaré, Quanta hypothesis: Thermodynamics and probability

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Let us go back to the kinetic theory of gases; the gases are formed of molecules which circulate in all directions with great velocities; their trajectories would be rectilinear if from time to time they did not collide each other, … Read More

Henri Poincaré, Quanta hypothesis

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One wonders if Mechanics is not on the eve of a new upheaval; recently a meeting was held at Brussels, attended by some twenty physicists of various nationalities, and at each moment they might have been heard to speak of … Read More

Henri Poincaré, Mathematics and logic

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A few years ago, I had the opportunity to expose some ideas about the logic of the infinite; on the use of the infinite in Mathematics, on the use made of it since Cantor; I explained why I did not … Read More

Henri Poincaré, The logic of infinity: An overview

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The antinomies to which certain logicians have been led come from the fact that they could not avoid certain vicious circles. It happened to them when they considered finite collections, but it happened to them much more often when they … Read More

Romania targets at least one important mandate of European Commissioner

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Romania is interested in one of the mandates of European Commissioners for regional policy, energy, transport and the environment. “We have not finished the regional policy mandate, so we could once again ask for this very important portfolio. So, I … Read More

Henri Poincaré, The logic of infinity: The use of infinity

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Is it possible to reason about objects that can notbe defined in a finite number of words? Is it even possible to talk about it knowing what one is talking about, and by saying something other than empty words? Or … Read More

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