HOWTOs# FCI: Full Configuration Interaction Theory Implementation details A Few Practical Notes A First Example Initial guess and parameters of the Davidson-Liu algorithm Spin-adapted FCI ACI: Adaptive Configuration Interaction Theory A Few Practical Notes A First Example Computing Excited States with ACI ACI Options MCSCF: Multi-Configuration Self-Consistent Field Theory Implementation Input Example Options Driven Similarity Renormalization Group Basics of DSRG Theoretical Variants and Technical Details Density Fitted (DF) and Cholesky Decomposition (CD) Implementations MR-DSRG Approaches for Excited States TODOs A Complete List of DSRG Teset Cases References Active Space Embedding Theory Simple active space frozen-orbital embedding Atomic Valence Active Space (AVAS) Overview Input example Defining the molecular plane for π orbitals Systems with multiple π systems Options Citation Reference Plotting MOs Generating cube files Reading, manipulating, and saving cube files Plotting cube files Generating cube files Forte Python API Tutorial (NEW) Creating the input node Hartree–Fock theory FCI and CASCI