Householder reflections

Hold

Techniques

Reflections used to zero out subdiagonal elements in QR factorization.

Why it's here

Placed in Hold: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 0 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.

Evidence (1)

5Hacker News·8/15/2026research
Auto-research with Codex delivers a 232x faster QR kernel
A Hacker News post describes how the author used Codex in GPU Mode to iteratively optimize a batched square QR decomposition kernel for a contest. The final solution achieved a 232x speedup over the baseline and ranked 12th out of 183 participants, highlighting agent-assisted kernel tuning and auto-research workflows.