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export path for c compiler

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@ -19,16 +19,17 @@ Double Exchange Hamiltonian: Complete Version
1. Export environment variables for PETSc and SLEPc
```shell
export PETSC_DIR=${PATH_TO_PETSC_INSTALLATION}
export SLEPC_DIR=${PATH_TO_SLEPC_INSTALLATION}
```
```shell
export PETSC_DIR=${PATH_TO_PETSC_INSTALLATION}
export SLEPC_DIR=${PATH_TO_SLEPC_INSTALLATION}
export C_INCLUDE_PATH+=:$PETSC_DIR/include/:$SLEPC_DIR/include:$PETSC_DIR/arch-linux2-c-debug/include/:$SLEPC_DIR/arch-linux2-c-debug/include
```
2. Make the executable
```shell
make ex1
```
```shell
make ex1
```
3. Using DEHam
---------------
@ -37,25 +38,25 @@ Double Exchange Hamiltonian: Complete Version
has the topology of the Hamiltonian and the various parameters
as explained below in a sample inputfile:
```python
140 # The total number of determinants
7 # The largest number of non-zero elements per row
2 # The number of processors used in parallel
1 # The number of holes
0 # The isz (ms-1/2) value
1,2,3,1,2,3,4,5,6,7 # The topology of the system is specified here
2,3,4,8,7,6,5,6,7,8 # first and second line contain the two sites linked
1,1,1,2,2,2,2,3,3,3 # third line contains the type of link (1 for t, J 2 for K and 3 for none)
.1430,-0.20,0.0000 # The three types of links this line gives J, K
.1430,-0.20,0.0000 #
-1.00,0.0,0.00 # This line gives t
```
```python
140 # The total number of determinants
7 # The largest number of non-zero elements per row
2 # The number of processors used in parallel
1 # The number of holes
0 # The isz (ms-1/2) value
1,2,3,1,2,3,4,5,6,7 # The topology of the system is specified here
2,3,4,8,7,6,5,6,7,8 # first and second line contain the two sites linked
1,1,1,2,2,2,2,3,3,3 # third line contains the type of link (1 for t, J 2 for K and 3 for none)
.1430,-0.20,0.0000 # The three types of links this line gives J, K
.1430,-0.20,0.0000 #
-1.00,0.0,0.00 # This line gives t
```
2. running DEHam
```shell
mpiexec -n [nprocs] ./ex1 inpfile
```
```shell
mpiexec -n [nprocs] ./ex1 inpfile
```
4. Publications using this code
-------------------------------