The White House shared a formula containing symbols like epsilon and phi—but critics pointed out they served no purpose.

Sigma Alpha Epsilon is a Greek-letter social college fraternity founded at the University of Alabama on March 9, 1856. Of all existing national social fraternities today, Sigma Alpha Epsilon is the ...

The most perplexing part of the formula, though, is the first portion of the lower part of the equation where the Greek letter "e" (for epsilon) is multiplied by the letter phi. Both of these ...