L’Invitation au Voyage, poème de Charles Baudelaire
Mon enfant, ma sœur, Songe à la douceur D’aller là-bas vivre ensemble ! Aimer à loisir, Aimer et mourir Au pays qui te ressemble ! Les soleils mouillés De ces ciels brouillés Pour mon esprit ont les charmes Si mystérieux De tes traîtres yeux, Brillant à travers leurs larmes. Là, tout n’est qu’ordre et beauté, Luxe, calme et volupté. Des meubles luisants, Polis par les ans, Décoreraient notre chambre ; Les plus rares fleurs Mêlant leurs odeurs Aux vagues senteurs de l’ambre, Les riches plafonds, Les miroirs profonds, La splendeur orientale, Tout y parlerait À l’âme en secret Sa douce langue natale.
My hero: Noam Chomsky by Charles Glass
"My heroes have always been cowboys," Willie Nelson sang, a sentiment I shared when I was a child in California. My hero in my teenage years, while most of my contemporaries were demonstrating against the US war in Vietnam, was the greatest cowboy star of them all, John Wayne. When I was 16, he gave me a job. I admired him, and I still do. Things changed when I moved to Beirut in 1972 and saw the devastation wreaked by US weaponry on Palestinian refugee camps and Lebanese villages.
Eulerscher Polyedersatz
Das konvexe Ikosaeder erfüllt den eulerschen Polyedersatz Ein nichtkonvexes Polyeder mit 12 Ecken, 36 Kanten und 32 Flächen, für das E + F − K = 2 nicht gilt Das Sterntetraeder, ein konkaves Polyeder mit 14 Ecken, 36 Kanten und 24 Flächen, für das E + F − K = 2 gilt Der Eulersche Polyedersatz (auch: Eulersche Polyederformel), benannt nach Leonhard Euler, beschreibt eine fundamentale Eigenschaft von beschränkten, konvexen Polyedern und allgemeiner von planaren Graphen. Hinter der Formel steckt das topologische Konzept der Euler-Poincaré-Charakteristik und die Eulersche Polyederformel ist der Spezialfall
Wikibooks
Raconter le travail
Il est Professeur au Collège de France. Il a publié de nombreux ouvrages sur l’histoire de la démocratie et ses métamorphoses contemporaines, dont notamment La société des égaux (Points-Seuil, 2013), La légitimité démocratique. Impartialité, réflexivité, proximité (Points-Seuil, 2010) et La contre-démocratie. La politique à l’âge de la défiance (Points-Seuil, 2006). Il contribue aussi à animer un débat public informé, en dirigeant notamment la collection de la République des idées et le site La Vie des idées.
Evolutionary game theory
Evolutionary game theory (EGT) is the application of game theory to evolving populations of lifeforms in biology. EGT is useful in this context by defining a framework of contests, strategies, and analytics into which Darwinian competition can be modelled. EGT originated in 1973 with John Maynard Smith and George R.
Triangular matrix
Description[edit] A matrix of the form is called a lower triangular matrix or left triangular matrix, and analogously a matrix of the form is called an upper triangular matrix or right triangular matrix. The variable L (standing for lower or left) is commonly used to represent a lower triangular matrix, while the variable U (standing for upper) or R (standing for right) is commonly used for upper triangular matrix. A matrix that is both upper and lower triangular is diagonal.
Tit for tat
In Western business cultures, a handshake when meeting someone is an example of initial cooperation. Tit for tat is an English saying meaning "equivalent retaliation". It is also a highly effective strategy in game theory for the iterated prisoner's dilemma. The strategy was first introduced by Anatol Rapoport in Robert Axelrod's two tournaments,[1] held around 1980.
Invertible matrix
In linear algebra, an n-by-n square matrix A is called invertible (also nonsingular or nondegenerate) if there exists an n-by-n square matrix B such that where In denotes the n-by-n identity matrix and the multiplication used is ordinary matrix multiplication. If this is the case, then the matrix B is uniquely determined by A and is called the inverse of A, denoted by A−1. A square matrix that is not invertible is called singular or degenerate. A square matrix is singular if and only if its determinant is 0. Singular matrices are rare in the sense that a square matrix randomly selected from a continuous uniform distribution on its entries will almost never be singular.
Partial derivative
The partial derivative of a function f with respect to the variable x is variously denoted by The partial-derivative symbol is ∂. One of the first known uses of the symbol in mathematics is by Marquis de Condorcet from 1770, who used it for partial differences.
500 livres gratuits de programmation ou d’informatique
Une page qui recenserait 500 livres d’informatique ou de programmation, voilà bien un rêve d’informaticien qu’a réalisé Victor Felder sur son Github à cette page. Ces ressources sont bien souvent au format PDF évidemment en anglais et abordent les thèmes suivants : Meta-Lists Graphics user interfaces Graphics Programming Language Agnostic Algorithms & Datastructures Theoretical Computer Science Operating systems Database Networking Compiler Design Programming Paradigms Parallel Programming Software Architecture Open Source Ecosystem Information Retrieval Datamining Machine Learning Mathematics Misc Web Performance MOOC Professional Development Ada Android APL Autotools ASP.NET MVC Assembly Language Bash C C++ Clojure CoffeeScript ColdFusion D Dart DTrace DB2 Delphi / Pascal Elasticsearch Emacs Erlang Flex F# Forth Git Go Grails Hadoop Haskell HTML / CSS Icon IDL iOS J Java JavaScript Backbone.js D3.js jQuery Knockout.js Node.js Django Flask
Online Music Piracy Doesn’t Hurt Sales, European Commission Finds
New research published by the European Commission's Joint Research Centre shows that online piracy doesn't hurt digital music revenues. The researchers examined browsing habits from 16,000 Europeans and found that there's a positive link between online piracy and visits to legal music stores, irrespective of people's interest in music. The study concludes that the music industry should not see piracy as a growing concern.
