The Map is Not the Territory
New Math Game: Factor Dominoes! Lately I've been looking for different ways for my seven year old and I to conceptualize multiplication.
This page collects in one place all the entries in the geometry junkyard. Acme Klein Bottle . A topologist's delight, handcrafted in glass. The Geometry Junkyard: All Topics
Links: Realisation of PentiDisc
Pictures of Math
Golden Ratio & Golden Section : : Golden Rectangle : : Golden Spiral Golden Ratio & Golden Section In mathematics and the arts, two quantities are in the golden ratio if the ratio between the sum of those quantities and the larger one is the same as the ratio between the larger one and the smaller. Expressed algebraically: The golden ratio is often denoted by the Greek letter phi (Φ or φ).
The term yupana, deriving from the word Quechua yupay (count), is commonly defined as an abacus used to perform arithmetic operations dating back to the time of the Incas Types of yupana The term yupana refers to two distinct classes of objects: table-yupana (or archaeological yupana): a system of trays of different sizes and materials, carved at the top into geometric boxes were is assumed seeds or pebbles were be placed. The first of these tables was found in 1869 in the province of Cuenca (Ecuador) and marked the beginning of systematic studies on these objects. All archaeological finds are very different from each other.yupana of Poma de Ayala: a picture on page 360 of El primer nueva corónica y buen gobierno written by the chronicler of the Indies Poma de Ayala, representing a 5x4 chessboard. Yupana - an Incan Fibonacci Calculator
A standing wave. Node (physics)
Evolution of the limit cycle in the phase plane. Notice the limit cycle begins as circle and, with varying μ, become increasingly sharp. An example of a Relaxation oscillator. Van der Pol oscillator
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.
December 2009 Think drug-induced hallucinations, and the whirly, spirally, tunnel-vision-like patterns of psychedelic imagery immediately spring to mind. But it's not just hallucinogenic drugs like LSD, cannabis or mescaline that conjure up these geometric structures. People have reported seeing them in near-death experiences, as a result of disorders like epilepsy and schizophrenia, following sensory deprivation, or even just after applying pressure to the eyeballs. So common are these geometric hallucinations, that in the last century scientists began asking themselves if they couldn't tell us something fundamental about how our brains are wired up.
Sin & Cos: The Programmer's Pals!
GNU Octave is a high-level interpreted language, primarily intended for numerical computations. It provides capabilities for the numerical solution of linear and nonlinear problems, and for performing other numerical experiments. It also provides extensive graphics capabilities for data visualization and manipulation.
See Math tricks on video at the Wild About Math! mathcasts page. Being able to perform arithmetic quickly and mentally can greatly boost your self-esteem, especially if you don't consider yourself to be very good at Math. And, getting comfortable with arithmetic might just motivate you to dive deeper into other things mathematical. This article presents nine ideas that will hopefully get you to look at arithmetic as a game, one in which you can see patterns among numbers and pick then apply the right trick to quickly doing the calculation.
LiveMath™ Software Products
An Intuitive Explanation of Fourier Theory Steven Lehar firstname.lastname@example.org Fourier theory is pretty complicated mathematically. But there are some beautifully simple holistic concepts behind Fourier theory which are relatively easy to explain intuitively. There are other sites on the web that can give you the mathematical formulation of the Fourier transform.