Version 9.200, the changes since the last stable version (9.100) are:

• faster handling of symmetric positive definite matrices by rcond()
• faster transpose of matrices with size ≥ 512x512
• faster handling of compound sparse matrix expressions by accu(), diagmat(), trace()
• faster handling of sparse matrices by join_rows()
• added sinc()
• expanded sign() to handle scalar arguments
• expanded operators (*, %, +, −) to handle sparse matrices with differing element types (e.g. multiplication of complex matrix by real matrix)
• expanded conv_to() to allow conversion between sparse matrices with differing element types
• expanded solve() to optionally allow keeping solutions of systems singular to working precision