What is definition hurst?

As an AI language model, I don't have specific information about a person called Hurst. However, I can provide information about the term "Hurst" and related concepts.

The term "Hurst" might refer to:

• Hurst exponent: a mathematical index used to characterize the long-term memory of a time series or signal. It measures the degree of persistence or anti-persistence of the fluctuations in a signal. A Hurst exponent value of 0.5 indicates random fluctuations, values above 0.5 indicate more persistent fluctuations, and values below 0.5 indicate more anti-persistent (mean-reverting) fluctuations.
• Hurst cycle: a concept in technical analysis that suggests that financial markets exhibit recurring cycles or patterns that can be identified and exploited for trading purposes. The Hurst cycle theory is based on the idea that the Hurst exponent of a market price series can help predict future price movements and turning points.
• Hurst signal processing: a method of filtering and analyzing signals or images based on the Hurst exponent. The Hurst signal processing technique can be used to denoise, enhance, or segment signals or images with non-stationary and fractal properties.
• Hurst equation: a mathematical model used to describe the dynamics of population growth or diffusion in heterogeneous environments. The Hurst equation is derived from the diffusion equation and takes into account the spatial heterogeneity and memory effects in the dispersion processes.

These are some possible interpretations of the term "Hurst" in different domains. If you have a specific context or question related to Hurst, please provide more details so I can give a better answer.