Julie Rehmeyer
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All Stories by Julie Rehmeyer

Beer bubble math
The rate of change of bubble volume. If this quantity is positive, the bubble will grow; if it’s negative, it will shrink. A constant that depends on the temperature and the specific gas in the foam. (The foam on top of a glass of Guinness lasts unusually long because Guinness uses nitrogen in addition to […]

Math
Outstanding, superlinear cities
By a new mathematical method, New York City proves average and San Francisco exceptional.

Winning the World Series with math
To run the bases faster, baseball players just need a bit of mathematics, according to research by an undergraduate math major and his professors. Their calculations show that the optimal path around the bases is one that perhaps no majorleague ball player has ever run: It swings out a full 18.5 feet from the baseline. […]

Math
Crowdsourcing peer review
MATH TREK: A claimed proof that P≠NP spurs a massive collaborative research effort.

Math
When intuition and math probably look wrong
A twist on the Two Children Problem shows how information can steer what looks probable.

Math
‘Discounting’ the future cost of climate change
To figure out how much we should spend fighting climate change, economists have some questions for you: How much would you be willing to spend now to make your child $100 richer in the future? What about your grandchild in the farther future, or your greatgreatgreatgreatgreatgrandchild in the very distant future? The health of the […]

Math
Milliondollar math prize awarded, but not necessarily accepted
The reclusive mathematician who proved the Poincaré conjecture may or may not claim his prize.

Math
The mutual inspiration of art and mathematics
Economics, origami and other fields trigger new and original creations.

Math
Teaching a computer to spot a bogus Bruegel
Mathematicians apply a technique from vision research to find fake art.

Mathematics by collaboration
The Polymath project harnesses the power of the Internet to use massive collaboration to solve a major problem in record time