zacharye writes: Less than 2% of mobile carriers’ subscribers “Like” them on Facebook despite the millions of dollars they collectively spend in an effort to promote their services on the world’s most popular social network. Facebook made its initial public offering on Friday and while the company’s stock price dipped below the IPO price of $38 on Monday and continued to slide on Tuesday, Facebook’s offering was the biggest Internet IPO of all time by nearly 10 times. There is no denying that Facebook and the 900 million people who use the social network are of tremendous value to businesses looking to promote their services, but mobile carriers have seemingly not found success thus far as they attempt to bolster Facebook fan counts...
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"