Fortran computing core of the TT-Toolbox Right now, it is not easy to use as a standalone project.

It also includes two slightly customized libraries:

1. PRIMME code http://www.cs.wm.edu/~andreas/software/
2. Expokit code http://www.maths.uq.edu.au/expokit/

for doing fast local solvers in eigenvalue and dynamical problems.

===== Compilation

1. Create file Makefile.cpu in the currect directory with the following line

CPU = your_preset

where your_preset is one from Makefile.in (e.g. CPU = i4-intel). You may start from the example file Makefile.cpu.default provided. !!! For x64 systems! Note that the standalone programs (e.g. test_eigb below) require four-bytes integers without fPIC (i4-gnu-nopic or i4-intel-nopic), while the MATLAB MEX libraries require 8-bytes integers with fPIC, i8-gnu or i8-intel. !!!

2. Run make It will compile the static libraries mytt.a and primme/primme.a

3. Use the libs in your code =). To quick start, you may check the standalone test program for the block eigenvalue solver "test_eigb" (see Makefile). It computes 5 lowest eigenpairs of the Heisenberg chain with 20 spin-1/2 particles.