In this paper, we consider the strong instability of standing waves for the Hartree equation with a constant magnetic field.

Late physicist turned issue of when to stop searching for a better place to eat into mathematical problem When it comes to exploring a new city, it can be tricky to know when to stop searching for a ...

For those who celebrate it, tracking what day the holiday Easter takes place on can be a challenge. According to Christian religious traditions, Easter Sunday falls on the first Sunday following the ...

Celebrate Pi Day and read about how this number pops up across math and science on our special Pi Day page. For more than two millennia, mathematicians have produced a growing heap of pi equations in ...

As one of the most heavily regulated foods on the market, infant formula is subject to strict nutrition guidelines and undergoes rigorous safety and quality testing. But CR’s tests of infant formula ...

Five years ago, mathematicians Dawei Chen and Quentin Gendron were trying to untangle a difficult area of algebraic geometry involving differentials, elements of calculus used to measure distance ...

Ramanujan’s elegant formulas for calculating pi, developed more than a century ago, have unexpectedly resurfaced at the heart of modern physics. Researchers at IISc discovered that the same ...

While building a simpler model for particle interactions, physicists found a new representation involving pi—not a new value ...

The formula the Trump administration used to calculate his tariffs is bewildering economists. Economists argue the formula relies on a flawed underestimation of a key metric, resulting in inflated ...

President Donald Trump introduced his “discounted reciprocal tariffs” on over 200 countries on April 2. Most countries receive a base tariff rate of 10%, but for countries receiving more, the rates ...

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