Paul Ingrisano has trademarked the symbol for Pi and has nearly-exclusive rights to "I<3," the Internet shorthand expression for "I love." ...

Pi, represented by the symbol π, is one of the most famous and important constants in mathematics. It is defined as the ratio ...

The pi symbol isn't readily available on your iPhone's default keyboard, but there are tricks you can do to change that and have it available whenever you need.

In January, the U.S. Patent and Trademark Office gave Ingrisano a trademark on the symbol π.—pi followed by a period—a design Ingrisano uses on T-shirts sold at some brick-and-mortar stores.

What does the Pi symbol mean? There's actually a very interested, complicated explanation behind it that has ties to nature. Read more!

It's Pi Day! While the celebration is focused on the mathematical symbol, it also acts as the perfect excuse to eat a delicious, savory pizza or sweet, mouthwatering pie.

Pi Approximation Day celebrates the pi symbol (π) and its importance to mathematics. The symbol is a Greek letter, and it is used in mathematics to represent the ratio of the circumference of a ...

Pi Day is the annual celebration of the mathematical constant, Pi. Here's what to know about its date, and why we celebrate it by eating pie.

The calculator kept track of your attempts in calculating pi out — as well as your highest score — in the area near the pi symbol. And if you really wanted to get serious, you could view the ...

Some people (hint: us) are celebrating Pi Day by eating many, many helpings of many, manydifferent types of pie. Others are corralling their livestock onto a field to form the pi symbol. Not ...

She suggested bumper stickers, but it was her design for the sticker artwork that became the real boon. Hendrix developed a logo that continues to be a consistent seller almost a decade later.

Turns out you can't have your "pi," and eat it too. In January 2014, a Brooklyn artist named Paul Ingrisano trademarked the 3,000-year old mathematical symbol "π" followed by a period, and is ...