Dear Hugo,

I found, that off-diagonal Green function has not the correct form in the presence of off-diagonal hoppings. For example, this Hamiltonian:

H = -1*c_dag(0,0)c(0,1) + -1c_dag(0,1)c(0,0) + -1c_dag(1,0)c(1,1) + -1c_dag(1,1)*c(1,0) ,

has such off-diagonal Green function G(tau) between indices (0,0) and (0,1):

As I understand, the Green function should not have negative values.

Thanks very much in advance.
Yaroslav Zhumagulov

Dear Hugo,

I met the error "ImportError: cannot import name MeshProduct" while running the ipytriqs notebook in ./doc. I have checked the current pytriqs modules but can not find MeshProduct (also the MeshImTime is now located at pytriqs.gf.local.gf). I am wondering which version of triqs should I look for this module?

Thanks very much in advance!
Tsung-Han