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Arithmetic Properties of Fractal Estimates - Department of ...

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<strong>Fractal</strong> geometry – What is a fractal?<br />

<strong>Arithmetic</strong><br />

<strong>Properties</strong> <strong>of</strong><br />

<strong>Fractal</strong><br />

<strong>Estimates</strong><br />

Tommy<br />

Löfstedt<br />

Outline<br />

Problem<br />

description<br />

<strong>Fractal</strong><br />

geometry<br />

Multifractal<br />

geometry<br />

<strong>Arithmetic</strong>s <strong>of</strong><br />

fractals<br />

Projections <strong>of</strong><br />

fractal<br />

measures<br />

Results<br />

Conclusions<br />

Roughly, the dimension <strong>of</strong> a set describes how much space the<br />

set fills<br />

Definition:<br />

The set has fine structure, it has details on arbitrary scales.<br />

The set is too irregular to be described with classical<br />

euclidean geometry, both locally and globally.<br />

The set has some form <strong>of</strong> self-similarity, this could be<br />

approximate or statistical self-similarity.<br />

The Hausdorff dimension <strong>of</strong> the set is strictly greater than<br />

its Topological dimension.<br />

The set has a very simple definition, i.e. it can be defined<br />

recursively.

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