Experimental Mathematics

Higher-Dimensional Box Integrals

Jonathan M. Borwein, O-Yeat Chan, and R. E. Crandall

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Abstract

Herein, with the aid of substantial symbolic computation, we solve previously open problems in the theory of $n$-dimensional box integrals $B_n(s) := \langle|\vec{r}|^s\rangle, \vec{r} ∈ [0, 1]^n$. In particular, we resolve an elusive integral called $\mathcal{K}_5$ that previously acted as a “blockade” against closed-form evaluation in $n = 5$ dimensions. In consequence, we now know that $B_n$(integer) can be given a closed form for $n = 1, 2, 3, 4, 5$. We also find the general residue at the pole at $s = −n$, this leading to new relations and definite integrals; for example, we are able to give the first nontrivial closed forms for six-dimensional box integrals and to show hyperclosure of $B_6$(even). The Clausen function and its generalizations play a central role in these higher-dimensional evaluations. Our results provide stringent test scenarios for symbolic-algebra simplification methods.

Article information

Source
Experiment. Math. Volume 19, Issue 4 (2010), 431-446.

Dates
First available in Project Euclid: 4 October 2011

Permanent link to this document
http://projecteuclid.org/euclid.em/1317758103

Mathematical Reviews number (MathSciNet)
MR2778656

Zentralblatt MATH identifier
06074861

Keywords
Box integral trilogarithm arctan integral

Citation

Borwein, Jonathan M.; Chan, O-Yeat; Crandall, R. E. Higher-Dimensional Box Integrals. Experiment. Math. 19 (2010), no. 4, 431--446. http://projecteuclid.org/euclid.em/1317758103.


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