approximate_thread_double

Multi-threaded Dirac-to-Dirac reduction.

This variant performs the same computation as approximate_double but uses parallel execution in the C++ backend.

Recommended for:

• Large M
• Large L
• High-dimensional problems

Produces identical numerical results to the single-threaded variant.

Example

result = d2d.approximate_thread_double(y, M, L, N, x)