December 2024: Delivered structured matrix norm support in JuliaLang/LinearAlgebra.jl with tests, ported from main Julia PR. Implemented 1-norm, 2-norm, and infinity-norm for structured matrices (Bidiagonal, Diagonal, Tridiagonal, SymTridiagonal) and added tests validating correctness against general matrix norms. Ported structured opnorm changes from the main Julia PR (originally authored by mcognetta) to ensure consistency with core implementations. This work enhances numeric stability and usability for users performing norms on structured matrices and aligns with core opnorm changes. No major bugs fixed this month; emphasis on feature delivery and test coverage. Overall impact: broader, more reliable norm computations for structured matrices, enabling improved performance in downstream numerical workloads.