Equal Sums of Like Powers Chen Shuwen's extensive collection of equal sums of like powers , especially those that are solutions to multigrade equations. euler.free.fr/eslp/
Equations Involving Sums of Powers Jerzy Urbanowikz' paper on diophantine equations involving sums of powers with quadratic characters as coefficients. archive.numdam.org/ARCHIVE/CM/CM_1996__102_2/CM_1996__102_2_125_0/CM_1996__102_2_125_0.pdf
Mathematician's Secret Room Unsolved problems in Number Theory. English and Japanese text by Hisanori Mishima. www.asahi-net.or.jp/~KC2H-MSM/mathland/overview.htm
Power Page Steve Dutch's page about powers of numbers. www.uwgb.edu/dutchs/RECMATH/rmpowers.htm
Sortedsums D. J. Bernstein's collection of tools for enumerating small solutions to certain types of equal sums of like powers. cr.yp.to/sortedsums.html
The Fifth Taxicab Number is 48988659276962496 David W. Wilson's article on his search for the smallest integer that can be expressed as a sum of two positive cubes in 5 distinct ways , up to order of summands. www.cs.uwaterloo.ca/journals/JIS/wilson10.html
Tom's Mathematical Things Dissertation about equal sums of like powers by Tom Womack. tom.womack.net/maths/dissert_abstract.htm
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