Five tests segfaulted on Linux and passed on Windows, on the same commit. The bug was a struct whose type quietly demanded an alignment malloc never promised — and the faulting instruction was not where the crash looked …
What computational fluid dynamics actually is — the history from Euler to WENO schemes, why analytical solutions and wind tunnels both hit walls, and where the hard parts lie.
Bringing AVX2 to Project Euler 38 — what 256-bit registers buy when the same pandigital check runs over thousands of candidates, and how the C++ compares to scalar code.