Darboux Integral
A variant of the Riemann Integral defined when the Upper and Lower Integrals, taken as limits of the Lower Sum
and Upper Sum
are equal. Here,
is a Real Function, 
is a monotonic increasing function with respect to which thesum is taken, 
denotes the lower bound of over the interval 
, and 
denotes the upper bound.See also Lower Integral, Lower Sum, Riemann Integral, Upper Integral, Upper Sum
References
Kestelman, H. Modern Theories of Integration, 2nd rev. ed. New York: Dover, p. 250, 1960.
- Unknotting Number
- Unless
- Unlesss
- Unmixed
- Unpoke Move
- Unsafe
- Unsolved Problem
- Unstable Improper Node
- Unstable Node
- Unstable Spiral Point
- Unstable Star
- Untouchable Number
- U-Number
- Upper Bound
- Upper Integral
- Upper Limit
- Upper Sum
- Upper-Trimmed Subsequence
- Upward Drawing
- Urchin
- Utility Graph
- Utility Problem
- Valence
- Valency
- Valuation