[petsc-users] does it help if I reorder the Vector

[Xuan YU]

Hi, all

For a vector of 1800 variables, I have 1800 equations like  
y(i)'=y(y1,y2,...,yn,t), but RHSfunction only have 5 y(j), so if I put  
related y(i) next to each other, the RHSfunction will become more  
banded, and Jacobian Matrix will be more banded also, the time  
consumption will go down. Am I right?

Thanks!

Xuan YU
xxy113 at psu.edu