Two mathematicians have proved that a straightforward question—how hard is it to untie a knot?—has a complicated answer.

Joseph Nguyen is a contributing author at Investopedia and a research analyst with experience at a securities brokerage firm. Samantha (Sam) Silberstein, CFP®, CSLP®, EA, is an experienced financial ...

The degree of a polynomial function is the highest power of the variable in its expression. The degree dictates the maximum number of turning points the graph can have. A turning point is a location ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Abstract: Label distribution learning (LDL), leveraging the label significance (LS), is more appropriate for solving label ambiguity problems than multilabel learning (MLL). However, directly ...

A version of this story appears in the September 2020 issue of National Geographic magazine. Philadelphia detected its first case of a deadly, fast-spreading strain of influenza on September 17, 1918.

The first step, before any calculations or plotting of data, is to decide what type of data one is dealing with. There are a number of typologies, but one that has proven useful is given in Table 1.1.

The right candidate may find the setup in Tennessee appealing. Plus, Aaron Glenn on the hot seat and the Commanders’ long-term approach to their roster. From Thomas Estes (@thomas_estes98): Is the ...

Abstract: Heat diffusion has been widely used in brain imaging for surface fairing, mesh regularization and cortical data smoothing. Motivated by diffusion wavelets and convolutional neural networks ...