Andrii Gakhov, Ph.D.

Andrii Gakhov is a mathematician and software engineer holding a Ph.D.in mathematical modeling and numerical methods. He has been a teacher in the School of Computer Science at V. Karazin Kharkiv National University in Ukraine for a number of years and currently works as a software practitioner for ferret go GmbH, the leading community moderation, automation, and analytics company in Germany. His fields of interests include machine learning, stream mining, and data analysis.

Edition	Location	Original text	Corrected text
[paperback]	p. 31	"... by bitwise XOR, however ..."	"... by bitwise AND, however ..."
[paperback]	p. 62, Example 3.1	"... of unique elements is 23 GB."	"... of unique elements is 2.3 GB."
[paperback]	p. 81, Formula 3.12	$$\hat n \approx \alpha_{m}\cdot m^{2} \cdot \left(\sum_{j=0}^{m-1}2^{-COUNTER[j]}\right)$$	$$\hat n \approx \alpha_{m}\cdot m^{2} \cdot \left(\sum_{j=0}^{m-1}2^{-COUNTER[j]}\right)^{-1}$$
[paperback]	p. 96, Example 4.2	"... 500 billion ..."	"... 500 million ..."
[paperback]	p. 137, Example 5.3	"... remaining empty buffer \(B_{2}\)."	"... remaining empty buffer \(B_{4}\)."
[paperback]	p. 176, Example 6.8	$$c(d_1, d_4) = \frac{255 \cdot 0 + 0 \cdot 191 + 0 \cdot 255}{255 \cdot 255} = 0$$	$$c(d_1, d_4) = \frac{255 \cdot 0 + 0 \cdot 191 + 0 \cdot 255}{\sqrt{255^{2} + 0^2 + 0^2} \cdot \sqrt{0^{2} + 191^2 + 255^2}} = 0$$