Math
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Hermitech Laboratory - Formulator Tarsia
With this software you will easily be able to create, print out, save and exchange customised jigsaws, domino activities and a variety of rectangular card sort activities. The activities created using this software can be presented in printable form, ready to cut out. Formulator Tarsia known earlier as Formulator Jigsaw is an editor designed for Teachers of Mathematics creating the activities in a form of jigsaws or dominos etc for later use in a class.
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Plein de documents, d'applets, d'activités pour la maternelle, l'école primaire, le collège, le lycée et l'université avec ou sans GeoGebra ; des exercices, des animations, des simulations pour les Mathématiques et les Sciences physiques pour tous les niveaux d'enseignement. Vous êtes nombreux à vouloir vous servir mais comme il n'y a pratiquement pas de liens retour vers ce site* ....... A ce jour ,il y a environ 8000 fichiers Geogebra dont beaucoup sont déja recopiés sur de nombreux sites ou livres sans même citer leur origine et sans autorisation de l'auteur . Magnifique !! Je rappelle à tous que ces fichiers mis gratuitement en ligne ne me rapportent rien contrairement à ce que certains pensent .Mais ,peut- être ,ai-je tort ?
Mathematiques et sciences physiques avec Geogebra(Daniel Mentrard)
Teacher Portal - Sumdog's free maths games
It's a race through the house to reach a patch of juicy carrots, with up to four hungry rabbits taking part. Answer correctly to make your bunny faster... but watch out for the hazards along the way! If you don't click the warning in time, your bunny will get caught...Math problems + puzzle for kids
These arithmetical puzzles, which can also be used in lessons, are divided into three levels: "Easy", "Medium" and "Hard". Five numbers between 1 and 9 are combined using multiplication, division, addition and subtraction, with different numbers provided in different places to help you, depending on the level of difficulty. Recommend for kids from 7 years upwards (elementary / primary school). The sequence of the arithmetical skills applies is always multiplication, division, addition and subtraction.
The odd genius who showed that one infinity was greater than another
This problem of infinity was pondered by Georg Cantor. What he concluded started him down a road that wound through infamy, through respectability, and wound up in theology. Find out more than anyone ever cared to consider about the infinite. Imagine a thin line, almost a thread, stretching to infinity in both directions.
This really is the week for mathematical bugs. First, one beetle showed us why we live in a universe of despair . Now, another shows us that whatever can go wrong, will go wrong...and the more that things can go wrong, the more things will go wrong. See how a bug proves a knotty conjecture.
A mathematical bug shows us why the 3D universe leads to Murphy's Law
A mathematical bug shows us why the 3D universe carries the possibility of despair. Really.
George Polya was a mathematician. Like most mathematicians, he was concerned with very strange concepts. One of them was the idea of "random walks," or the completely random path a strolling insect might take. He took this concept and expanded it until he could prove the chances of getting hopelessly, unendingly lost in the universe. Find out why. Let's say that there is a universe that has nothing but space, time, and an immortal bug (hey, there are stranger ideas).
The simplest proof mathematicians needed two tries at
There is a famous mathematical proof called The Jordan Curve Theorem. It's wrong. Camille Jordan came up with it at the end of the 19th century, and it bears his name, despite being inaccurate, because there is no justice in the world. There are plenty of proofs out there that are wrong, but this one is notable for proving something so very, very simple. Find out how hard it is to prove an obvious statement. One of the frustrating things about academia is the fact that the simplest things are the hardest to define.
Amicable Numbers are definitive proof that mathematicians are very inventive, but too often bored. When you put both these qualities together, you get a bunch of people making up new kinds of numbers to be interested in. The most endearingly-named of these numbers are called Amicable Numbers. The two are an Amicable Pair. The pairs are always either both even or both odd. Amazingly, these numbers have been an established concept in mathematics for thousands of years, with mathematician Thabit ibn Qurra (Also spelled Kurrah) coming up with a formula to find them in 850.
What are Amicable Numbers?
Four color theorem - Wikipedia, the free encyclopedia
A four-coloring of a map of the states of the United States (ignoring water and other countries). In mathematics , the four color theorem , or the four color map theorem states that, given any separation of a plane into contiguous regions, producing a figure called a map , no more than four colors are required to color the regions of the map so that no two adjacent regions have the same color. Two regions are called adjacent if they share a common boundary that is not a corner, where corners are the points shared by three or more regions. [ 1 ] For example, Utah and Arizona are adjacent, but Utah and New Mexico , which only share a point that also belongs to Arizona and Colorado , are not. Despite the motivation from coloring political maps of countries , the theorem is not of particular interest to mapmakers. According to an article by the math historian Kenneth May ( Wilson 2002 , 2), "Maps utilizing only four colours are rare, and those that do usually require only three.Bifurcation diagram - Wikipedia, the free encyclopedia
In mathematics , particularly in dynamical systems , a bifurcation diagram shows the possible long-term values (equilibria/fixed points or periodic orbits) of a system as a function of a bifurcation parameter in the system. It is usual to represent stable solutions with a solid line and unstable solutions with a dotted line. The bifurcation parameter r is shown on the horizontal axis of the plot and the vertical axis shows the possible long-term population values of the logistic function. Only the stable solutions are shown here, there are many other unstable solutions which are not shown in this diagram. The bifurcation diagram nicely shows the forking of the possible periods of stable orbits from 1 to 2 to 4 to 8 etc. Each of these bifurcation points is a period-doubling bifurcation .This is an attempt to collect all known amicable pairs. I would appreciate receiving any kind of updates and corrections. Comments are welcome too. Please visit my pages with various AP lists and statistics ; and tables of other kinds of aliquot cycles.
Known Amicable Pairs
Today's date, 11/11/11, is a once-in-a-century occurrence, adding to a November has been a very fun month for recreational mathematicians. Last week, a rare eight-digit palindrome date — 11/02/2011, which reads the same frontward and backward — was found to have other mathematical qualities that made it a once-in-10,000-years date . Aziz Inan, a professor of electrical engineering at the University of Portland, Oregon, crunched the numbers and found that when the date was expressed as a number, 11,022,011, it has very special properties. "It is the product of 7 squared times 11 cubed times 13 squared.