For a set , the span is defined by , where max is the maximum and min is the minimum.
Set Span
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References
Guy, R. K. Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, p. 207, 1994.Referenced on Wolfram|Alpha
Set SpanCite this as:
Weisstein, Eric W. "Set Span." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/SetSpan.html