The most anticipated leadership transition in Silicon Valley is official. On Sept. 1, John Ternus will become Apple Inc‘s CEO, inheriting a company fundamentally more massive than the one Tim Cook took over in 2011. But while the transition appears smooth, the spreadsheet tells a haunting story: Ternus isn't just following a legend; he appears in for a battle against the laws of finance. The 19-Apple Challenge: A Mathematical Peak To understand the pressure, look at the “Cook Multiplier.” When C