//! E9: Mobile Block Hessian (MBH)
//!//! Reduces vibrational analysis cost by treating rigid groups (aromatic rings,
//! clusters) as rigid bodies with 6 DOF each, enabling real-time IR spectra
//! for large molecules.
pubmodblocks;pubmodhessian;pubuseblocks::{build_projection_matrix, detect_rigid_blocks, BlockDecomposition, RigidBlock};pubusehessian::{compute_mbh_frequencies, MbhConfig, MbhResult};