UF Sparse Matrix Collection: TKK group.

matrix	graph	Group/Name	id	download	# rows	# cols	nonzeros	type	sym	spd?
		TKK/cbuckle	1912	MAT, MM, RB	13,681	13,681	676,515	real symmetric	yes	yes
		TKK/cyl6	1913	MAT, MM, RB	13,681	13,681	714,241	integer symmetric	yes	no
		TKK/engine	1910	MAT, MM, RB	143,571	143,571	4,706,073	integer symmetric	yes	no
		TKK/g3rmt3m3	1907	MAT, MM, RB	5,357	5,357	207,695	binary symmetric	yes	no
		TKK/plbuckle	1911	MAT, MM, RB	1,282	1,282	30,644	real symmetric	yes	yes
		TKK/s4dkt3m2	1906	MAT, MM, RB	90,449	90,449	3,753,461	binary symmetric	yes	no
		TKK/smt	1909	MAT, MM, RB	25,710	25,710	3,749,582	real symmetric	yes	yes
		TKK/t2d_q4	1916	MAT, MM, RB	9,801	9,801	87,025	real unsymmetric	69%	no
		TKK/t2d_q9	1917	MAT, MM, RB	9,801	9,801	87,025	real unsymmetric	69%	no
		TKK/t520	1908	MAT, MM, RB	5,563	5,563	286,341	integer symmetric	yes	no
		TKK/tube1	1914	MAT, MM, RB	21,498	21,498	897,056	binary symmetric	yes	no
		TKK/tube2	1915	MAT, MM, RB	21,498	21,498	897,056	integer symmetric	yes	no

Maintained by Tim Davis, last updated 10-Jun-2015.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
See UFget to download directly into MATLAB.