5. ALM: Force constant calculatorΒΆ 5.1. ALM: Input files Format of input files List of supported input variables Description of input variables How to make a DFSET file 5.2. ALM: Output files 5.3. ALM: Theoretical background Interatomic force constants (IFCs) Symmetry relationship between IFCs Constraints between IFCs Estimate IFCs by linear regression