Group JGD_Trefethen

Group Description 
Diagonal matrices with primes, Nick Trefethen, Oxford Univ.
From Jean-Guillaume Dumas' Sparse Integer Matrix Collection,
http://ljk.imag.fr/membres/Jean-Guillaume.Dumas/simc.html

Problem 7 of the Hundred-dollar, Hundred-digit Challenge Problems,
SIAM News, vol 35, no. 1.

7. Let A be the 20,000 x 20,000 matrix whose entries are zero
everywhere except for the primes 2, 3, 5, 7, . . . , 224737 along the
main diagonal and the number 1 in all the positions A(i,j) with
|i-j| = 1,2,4,8, . . . ,16384.  What is the (1,1) entry of inv(A)?

http://www.siam.org/news/news.php?id=388
Displaying all 11 collection matrices
Id Name Group Rows Cols Nonzeros Kind Date Download File
2210 Trefethen_700 JGD_Trefethen 700 700 12,654 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market
2209 Trefethen_500 JGD_Trefethen 500 500 8,478 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market
2208 Trefethen_300 JGD_Trefethen 300 300 4,678 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market
2203 Trefethen_20b JGD_Trefethen 19 19 147 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market
2206 Trefethen_200b JGD_Trefethen 199 199 2,873 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market
2212 Trefethen_20000b JGD_Trefethen 19,999 19,999 554,435 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market
2213 Trefethen_20000 JGD_Trefethen 20,000 20,000 554,466 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market
2211 Trefethen_2000 JGD_Trefethen 2,000 2,000 41,906 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market
2207 Trefethen_200 JGD_Trefethen 200 200 2,890 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market
2204 Trefethen_20 JGD_Trefethen 20 20 158 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market
2205 Trefethen_150 JGD_Trefethen 150 150 2,040 Combinatorial Problem 2008 MATLAB Rutherford Boeing Matrix Market