Deterministic ±1 sign vector — splitmix32 over (seed, lane), so a given (seed, n, lane) always yields the same signs on every machine. lane separates R1 from each layer's R2 without sign reuse.
lane
Deterministic ±1 sign vector — splitmix32 over (seed, lane), so a given (seed, n, lane) always yields the same signs on every machine.
laneseparates R1 from each layer's R2 without sign reuse.