Ensino Médio. Ângulos na Circunferência - Teorema de Tales. Ângulos e Arcos na Circunferência - Potência de Ponto. 6 razões para acreditar que estatística é a profissão do futuro. Patrícia Vieira O Google guarda cerca de 4 petabytes de dados.

Calculus Is So Last Century. Game Theory. :..: Blog about the Math`s Universe. Funções 2° Grau - Estudo dos Coeficientes. Agora que já aprendemos a calcular as raízes, vamos ver como se desenha a parábola no famoso plano cartesiano (plano XY).

Para fazer o desenho da parábola, temos que ter algumas características desta, e isso nós conseguimos fazendo um estudo nos coeficientes da função escolhida. Tá lembrado, os coeficientes são "a", "b" e "c". Triângulo equilátero inscrito numa circunferência. O uso da geometria plana, das suas definições, conceitos e fórmulas é muito comum em diversas situações cotidianas.

Real World Math Problems. Chess News - Arpad Elo and the Elo Rating System. By Daniel Ross Indiana University of Pennsylvnia Math 563 – Mathematical Statistics I Fall 2007 Ask any United States Chess Federation (USCF) member about his or her "Elo;" you will likely get an immediate and accurate response.

Now ask that same USCF member where the term "Elo" comes from. Something along the lines of, "I forget... someone told me what it stands for once, but I can't remember" is more likely than the correct response. Although the most widely used chess rating system in the world bears his name, few have anything more than a vague idea of how the system works while still fewer are aware of the statistician Dr. A physicist by discipline, the Hungarian-born Elo was a fervent amateur chess player the greater part of his life. While his rating system remains the most significant of his contributions, Dr. Upon being appointed chairman of the USCF rating committee in 1959, Arpad Elo was given the daunting task of overhauling the current rating system. Bibliography. World Football Elo Ratings. Elo rating system. Arpad Elo, the inventor of the Elo rating system The Elo rating system is a method for calculating the relative skill levels of players in such competitor-versus-competitor games as chess.

It is named after its creator Arpad Elo, a Hungarian-born American physics professor. The Elo system was invented as an improved chess rating system and is also used in many other games. It is also used as a rating system for multiplayer competition in a number of video games,[1] and has been adapted to team sports including association football, American college football, basketball, Major League Baseball, and esports. The difference in the ratings between two players serves as a predictor of the outcome of a match.

FATOS MATEMÁTICOS. Interactive Mathematics - Learn math while you play with it! Parabolas. Parabolas(This section created by Jack Sarfaty) Objectives: Lesson 1: Find the standard form of a quadratic function, and then find the vertex, line of symmetry, and maximum or minimum value for the defined quadratic function.

Lesson 2: Find the vertex, focus, and directrix, and draw a graph of a parabola, given its equation. Lesson 3: Find the equation of our parabola when we are given the coordinates of its focus and vertex. Lesson 4: Find the vertex, focus, and directrix, and graph a parabola by first completing the square. Complex numbers. This is an introduction to complex numbers. It includes the mathematics and a little bit of history as well. It is intended for a general audience.

The necessary background in a familiarity with ordinary real numbers (all positive and negative numbers and zero) and algebra. In one section some background in trigonometry is needed as indicated with the symbol. O Baricentro da Mente. Trigonometria. Seno e cosseno Dada uma circunferência trigonométrica contendo o ponto A=(1,0) e um número real x, existe sempre um arco orientado AM sobre esta circunferência, cuja medida algébrica corresponde a x radianos.

Seno: No plano cartesiano, consideremos uma circunferência trigonométrica, de centro em (0,0) e raio unitário. Seja M=(x',y') um ponto desta circunferência, localizado no primeiro quadrante, este ponto determina um arco AM que corresponde ao ângulo central a. Conrad Wolfram: Teaching kids real math with computers. Matematica Essencial para o Ensino Fundamental, Medio e Superior. Projeto Rumo ao ITA. Logical Paradoxes. Pictures of Math. 9 Mental Math Tricks. Math can be terrifying for many people.

This list will hopefully improve your general knowledge of mathematical tricks and your speed when you need to do math in your head. 1. Multiplying by 9, or 99, or 999 Multiplying by 9 is really multiplying by 10-1. MathPages. Learning the Habits of Mind that Enable Mathematical and Scientific Behavior. Math/Science Matters: Resource Booklets on Research in Math and Science Learning.

IntegralCALC. Modal Logic. 1.

What is Modal Logic? Narrowly construed, modal logic studies reasoning that involves the use of the expressions ‘necessarily’ and ‘possibly’. However, the term ‘modal logic’ is used more broadly to cover a family of logics with similar rules and a variety of different symbols. A list describing the best known of these logics follows. 2. The most familiar logics in the modal family are constructed from a weak logic called K (after Saul Kripke).