added td_rhogen function. The transition density can be negative. I have created a cloned function td_rhogen, which is essentially the version of xc_rhogen prior to Huub's negative density screening. I will consolidate this function later
added td_rhogen function. The transition density can be negative. I have created a cloned function td_rhogen, which is essentially the version of xc_rhogen prior to Huub's negative density screening. I will consolidate this function later




rangsimanketkaew/NWChem