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Entropie

Mesure du désordre d’un système (tout système isolé tend à se désorganiser). Autrement réfléchi, il peut s’agir du nombre de configurations possibles que peut adopter un système et donc, d’une mesure de son incertitude.

Entropy is the supreme law of the Universe, which illustrates that systems tend toward disorder, chaos, and destruction on all planes of existence unless energy is put into the system. In other words, nothing is permanent.

Dan Koe • The Art of Focus: Find Meaning, Reinvent Yourself and Create Your Ideal Future

What Is Entropy? A Measure of Just How Little We Really Know. | Quanta Magazine

Zack Savitsky quantamagazine.org

The second law of thermodynamics states that the entropy of closed physical systems always tends to increase, meaning that systems march from order to disorder. Think of dropping a dash of ink into a glass of clear water. The initial state, the one in which the drop of ink is localized in a gorgeous swirl, is information-rich. There are few ways

Cesar Hidalgo • Why Information Grows: The Evolution of Order, from Atoms to Economies

The total amount of free energy in the universe must decrease with time. The total amount of thermal entropy in the universe must increase with time.

Bobby Azarian • The Romance of Reality: How the Universe Organizes Itself to Create Life, Consciousness, and Cosmic Complexity

Entropy is a scientific concept, most commonly associated with states of disorder, randomness, or uncertainty .

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high-entropy macrostates have more equivalent microstates,

Bobby Azarian • The Romance of Reality: How the Universe Organizes Itself to Create Life, Consciousness, and Cosmic Complexity

“Entropy refers to an average of (physical) states, information to a particular (physical) state.”9

Cesar Hidalgo • Why Information Grows: The Evolution of Order, from Atoms to Economies

Well, the mathematical equation for Shannon’s uncertainty, which measures the amount of ignorance one has concerning the information in a message, is the same expression used to calculate Boltzmann’s statistical entropy, a measure of configurational disorder.