Progress on Fractal Dimensions of the Weierstrass Function and Weierstrass-Type Functions

The Weierstrass function <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>W</mi><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow><mo>=</mo&...

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Bibliographic Details
Main Authors: Yue Qiu, Yongshun Liang
Format: Article
Language:English
Published: MDPI AG 2025-02-01
Series:Fractal and Fractional
Subjects:
Online Access:https://www.mdpi.com/2504-3110/9/3/143
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Summary:The Weierstrass function <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>W</mi><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow><mo>=</mo><mstyle displaystyle="true"><munderover><mo>∑</mo><mrow><mi>n</mi><mo>=</mo><mn>1</mn></mrow><mo>∞</mo></munderover></mstyle><mrow><msup><mi>a</mi><mi>n</mi></msup><mo form="prefix">cos</mo><mrow><mo>(</mo><mn>2</mn><mi>π</mi><msup><mi>b</mi><mi>n</mi></msup><mi>x</mi><mo>)</mo></mrow></mrow></mrow></semantics></math></inline-formula> is a function that is continuous everywhere and differentiable nowhere. There are many investigations on fractal dimensions of the Weierstrass function, and the investigation of its Hausdorff dimension is still ongoing. In this paper, we summarize past researchers’ investigations on fractal dimensions of the Weierstrass function graph.
ISSN:2504-3110