17 ecuaciones que cambiaron el mundo by Ian Stewart

By Ian Stewart

Las ecuaciones, esos conjuntos de números y símbolos separados por el signo igual, son el alma de las matemáticas, l. a. ciencia y los angeles tecnología. Sin ellas, nuestro mundo no existiría en su forma genuine: escondidas para muchos, han constituido una fuerza motriz en l. a. civilización humana durante miles de años, abriendo nuevas perspectivas en campos tan variados como las comunicaciones, l. a. tecnología espacial o los angeles física nuclear. Que así es, es algo que se encarga de demostrar, con su maestría recurring, el distinguido matemático y reputado divulgador Ian Stewart. Para ello ha seleccionado 17 ecuaciones, pertenecientes a dos grupos diferentes. Uno es el de las ecuaciones que revelan regularidades matemáticas, como el teorema de Pitágoras, que nos cube cómo están relacionados los tres lados de un triángulo rectángulo, mientras que el otro es el de las ecuaciones que expresan leyes de los angeles naturaleza, como los angeles ley de gravitación common de Newton, las ecuaciones del electromagnetismo de Maxwell, l. a. ecuación de Schrödinger de los angeles mecánica cuántica, o los angeles ecuación desarrollada por Claude Shannon que outline cuánta información contiene un mensaje.
In In Pursuit of the Unknown, celebrated mathematician Ian Stewart makes use of a handful of mathematical equations to discover the very important connections among math and human growth. we regularly forget the ancient hyperlink among arithmetic and technological advances, says Stewart—but this connection is fundamental to any whole figuring out of human history.
Equations are modeled at the styles we discover on the planet round us, says Stewart, and it truly is via equations that we can make feel of, and in flip effect, our global. Stewart locates the origins of every equation he presents—from Pythagoras’s Theorem to Newton’s legislation of Gravity to Einstein’s idea of Relativity—within a selected old second, elucidating the improvement of mathematical and philosophical concept invaluable for every equation’s discovery. None of those equations emerged in a vacuum, Stewart exhibits; every one drew, indirectly, on prior equations and the taking into account the day. In flip, all of those equations prepared the ground for significant advancements in arithmetic, technological know-how, philosophy, and know-how. with no logarithms (invented within the early seventeenth century through John Napier and stronger by means of Henry Briggs), scientists do not have been in a position to calculate the stream of the planets, and mathematicians wouldn't have been in a position to enhance fractal geometry. The Wave Equation is among the most crucial equations in physics, and is essential for engineers learning the vibrations in autos and the reaction of structures to earthquakes. And the equation on the center of data concept, devised via Claude Shannon, is the foundation of electronic communique today.
An approachable and informative advisor to the equations upon which just about each point of clinical and mathematical realizing relies, In Pursuit of the Unknown can also be a reminder that equations have profoundly inspired our pondering and proceed to make attainable a number of the advances that we take with no consideration.

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Dans ces choix - souvent difficiles -, nous avons cherché à être fidèles à l'esprit de l'enseignement de la culture générale et à son utilisation dans les différentes épreuves où elle intervient. Ce dictionnaire de culture générale doit donc être considéré comme un ouvrage d'initiation. Nous souhaitons qu'il donne à son lecteur le désir d'approfondir et de compléter ses connaissances ; il se propose, en toute modestie, de lui montrer dans quel esprit il faut travailler et orienter ses recherches.

Elle dénonce la « démesure » (hubris) de Créon. Nul en effet n'a le droit, affirme Antigone, de se substituer aux dieux, d'interdire à un humain de se présenter au jugement des Enfers. Antigone se fait le champion de la loi divine, laquelle l'emporte sur la loi des hommes. Antigone est condamnée à être enterrée vivante. Les Érinyes punissent Créon : son fils Hémon, amoureux d'Antigone, se tue après avoir découvert sa fiancée pendue dans son tombeau ; et Eurydice, sa mère, femme de Créon, le suit dans la mort.

Elles se sont sédentarisées et groupées en importants villages, se dotant d'une organisation sociale. Ces pratiques se sont lentement diffusées et perfectionnées dans les vallées alluviales du Nil, du Tigre et de l'Euphrate. -C. -C. -C. Au même moment, en Mésopotamie, se développe la civilisation sumérienne, prélude à la constitution de l'empire de Babylone, rival potentiel de l'Égypte et second foyer de rayonnement culturel vers le plateau iranien, l'Asie Mineure et les îles de la mer Égée. Les Hébreux*, en Palestine, se trouvent à l'articulation des deux aires culturelles*.

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