In mathematics, a Perron number is an algebraic integer α which is real and exceeds 1, but such that its conjugate elements are all less than α in absolute value.
Any Pisot number or Salem number is a Perron number, as is the Mahler measure of a monic integer polynomial.
Read more about Perron Number: Perron Number of A Graph
Famous quotes containing the word number:
“It seems to me that there must be an ecological limit to the number of paper pushers the earth can sustain, and that human civilization will collapse when the number of, say, tax lawyers exceeds the world’s total population of farmers, weavers, fisherpersons, and pediatric nurses.”
—Barbara Ehrenreich (b. 1941)