Month: 2025-07 — Summary focused on stabilizing numerical computations in the lanl/singularity-eos repository, with a targeted bug fix that ensures correct matrix operations and lays groundwork for broader solver validations. 1) Key features delivered: - Stability enhancement in the EOS solve path by correcting the B vector shape to be compatible with matrix operations in solve_Ax_b_wscr, enabling reliable downstream computations and more robust simulations. - Change is isolated and low-risk, updating only the B dimension handling and related code in the workflow. 2) Major bugs fixed: - Bug: B vector dimension mismatch in solve_Ax_b_wscr. Fixed by converting B from a 1D vector to a 2D matrix with a single column to satisfy matrix operations, addressing the root cause of the mismatch. Commit details below. - Commit: d232ad686ae895bcca0b13880b9ad850fc03c98a (Update file mixed_cell_models.hpp) 3) Overall impact and accomplishments: - Restored correctness of the linear algebra path in the EOS solver, reducing risk of incorrect results and improving the reliability of simulations. - Small, well-contained change that facilitates future validations and testing of the solver pipeline. 4) Technologies/skills demonstrated: - Proficiency with C++ code and matrix operations, debugging complex numerical paths, code review discipline, and targeted, minimal-risk changes in a scientific codebase.