Indicator
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The Indicator from Planet Money
A bite-sized show about big ideas. From the people who make Planet Money, The Indicator helps you make sense of what's happening in today's economy. It's a quick hit of insight into money, work, and business. Monday through Friday, in 10 minutes or less.
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Is the determinant of this "Fibonacci sum" indicator matrix always $-1$, $0$, or $1$?
Let $M_n$ be the $ntimes n$ matrix with entries $$ (M_n)_{ij} ;=; begin{cases} 1 & text{if } i+j text{ is a Fibonacci number,}2pt 0 & text{otherwise,}end{cases} qquad 1 le i,j...
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