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Edney Ralph - Introducing fractals: a graphic guide

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Edney Ralph Introducing fractals: a graphic guide

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From Zeno to Mandelbrot: explore this new language with which you can describe the shape of cloud as precisely as an architect can describe a house.

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Contents

Why Do Fractals Matter?

John Archibald Wheeler (b. 1911), protg of the quantum pioneer Niels Bohr and friend of Albert Einstein, has been at the cutting edge of 20th-century physics, cosmology and quantum theory. Ian Stewart is a respected Professor of Mathematics at Warwick University. They are among the many scientists agreed that fractal geometry is a revolutionary breakthrough in our comprehension of reality.

NO ONE WILL BE CONSIDERED SCIENTIFICALLY LITERATE TOMORROW WHO IS NOT FAMILIAR - photo 1

NO ONE WILL BE CONSIDERED SCIENTIFICALLY LITERATE TOMORROW WHO IS NOT FAMILIAR WITH FRACTALS FRACTALS ARE IMPORTANT BECAUSE THEY REVEAL A NEW AREA OF MATHEMATICS DIRECTLY RELEVANT TO THE STUDY OF NATURE

A Smooth World or a Rough One?

Plato sought to explain nature with five regular solid forms. Newton and Kepler bent Platos circle into an ellipse. Modern science analysed Platos shapes into particles and waves, and generalised the curves of Newton and Kepler to relative probabilities still without a single rough edge. Now, more than two thousand years after Plato, nearly three hundred years after Newton, Benot Mandelbrot has established a discovery that ranks with the laws of regular motion. Professor Eugene Stanley, Center for Polymer Studies, Department of Physics, Boston University

Uniform Rectangular objects like boxes and buildings - photo 2
Uniform Rectangular objects like boxes and buildings Do not appear in - photo 3
Uniform Rectangular objects like boxes and buildings Do not appear in - photo 4
Uniform Rectangular objects like boxes and buildings Do not appear in - photo 5

Uniform Rectangular objects like boxes and buildings....Do not appear in nature

The world that we live in is not naturally smooth-edged. The real world has been fashioned with rough edges. Smooth surfaces are the exception in nature. And yet, we have accepted a geometry that only describes shapes rarely if ever found in the real world. The geometry of Euclid describes ideal shapes the sphere, the circle, the cube, the square. Now these shapes do occur in our lives, but they are mostly man-made and not nature-made.

The Texture of Reality

Nature deals in non-uniform shapes and rough edges. Take the human form. There is a certain symmetry about it, but it is, and has always been, indescribable in terms of Euclidean geometry. It is not a uniform shape. This is the issue. What has been missing from the scientific repertoire until very recently has been a way of describing the shapes and objects of the real world.

Clouds Are Not Spheres Bark Is Not Smooth Mountains Are Not Cones Coastlines - photo 6

Clouds Are Not Spheres Bark Is Not Smooth Mountains Are Not Cones, Coastlines Are Not Circles, Nor Does Lightning Travel In Straight Lines

The Broken Wrinkled And Uneven Shapes Of Nature Unlike EuclidS Ideal Forms - photo 7

.. The Broken, Wrinkled And Uneven Shapes Of Nature, Unlike EuclidS Ideal Forms Fractal Geometry Is The Geometry Of The Natural World-Animal, Vegetable And Mineral

The word fractal was coined in 1975 by the Polish/French/American mathematician, Benot Mandelbrot (b. 1924), to describe shapes which are detailed at all scales. He took the word from the Latin root fractus, suggesting fragmented, broken and discontinuous.

Fractal geometry is the geometry of the irregular shapes we find in nature, and in general fractals are characterized by infinite detail, infinite length, and the absence of smoothness or derivative.

The Origins of Fractals

Fractal geometry is an extension of classical geometry. It does not replace classical geometry, but enriches and deepens its powers. Using computers, fractal geometry can make precise models of physical structures from sea-shells to galaxies.

Fractal Geometry is a new language once you speak it you can describe the - photo 8

Fractal Geometry is a new language once you speak it, you can describe the shape of a cloud as precisely as an architect a house!

We will now trace the historical development of this mathematical discipline and explore its descriptive powers in the natural world, then look at the applications in science and technology and at the implications of the discovery.

Euclid of Alexandria c 300 BC laid down the rules which were to define the - photo 9

Euclid of Alexandria (c. 300 BC ) laid down the rules which were to define the subject of geometry for millennia to come. The shapes that Euclid studied straight lines and circles proved so successful in explaining the universe that scientists became blind to their limitations, denouncing patterns that did not fit in Euclids scheme as counterintuitive and even pathological.

A steady undercurrent of ideas starting in the 19th century with discoveries - photo 10
A steady undercurrent of ideas starting in the 19th century with discoveries - photo 11
A steady undercurrent of ideas starting in the 19th century with discoveries - photo 12

A steady undercurrent of ideas, starting in the 19th century with discoveries by Karl Weierstrass (181597), Georg Cantor (18451918) and Henri Poincar (18451912), led inexorably towards the creation of a whole new kind of geometry, with the power to describe aspects of the world inexpressible in the basic language of Euclid.

The Calculus

Johannes Kepler (15711630) was the first to realize that planets followed elliptical orbits, not perfect circles. Edmond Halley (16561742) guessed that elliptical orbits could be explained, by analogy with light, using an inverse square law.

However He lacked the means of proving this the necessary tools had not yet - photo 13

However, He lacked the means of proving this the necessary tools had not yet been invented

Sir Isaac Newton (16421727) derived a new method of reasoning based on the idea of vanishingly small quantities, or infinitesimals, in order to tame the complex motions of projectiles and planets and arrive at his celebrated theory of universal gravitation. The calculus was conceived simultaneously by Newton and Gottfried Wilhelm Leibniz (16461716). Leibniz developed the clearest formulation of the calculus, including the notation which is used to this day.

The twin tools of the calculus are differentiation

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