Pith Number

pith:SCKZ2TKU

pith:2026:SCKZ2TKU7R5RXVZCWPLVTA645T

not attested not anchored not stored refs pending

PermuQuant: Lowering Per-Group Quantization Error by Reordering Channels for Diffusion Models

Junxian Li, Kai Liu, Kaiwen Tao, Renjing Pei, Yongsen Cheng, Yulun Zhang, Zhikai Chen, Zhixin Wang

Reordering channels to group similar statistics reduces per-group quantization error in diffusion models.

arxiv:2605.09503 v2 · 2026-05-10 · cs.CV

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SCKZ2TKU7R5RXVZCWPLVTA645T}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

PermuQuant consistently reduces quantization error and outperforms existing PTQ baselines. On FLUX.1-dev with an RTX 5090, PermuQuant achieves up to a 1.8× single step speedup and reduces the DiT memory footprint by 3.5× under W4A4 NVFP4 quantization.

C2weakest assumption

That a permutation chosen on calibration data via the joint second-moment criterion will generalize to the full input distribution at inference time and will not introduce new artifacts in the generated outputs.

C3one line summary

PermuQuant reduces per-group quantization error in diffusion models by sorting channels with similar activation and weight statistics into the same groups using a calibration-checked permutation.

Cited by

1 paper in Pith

OrbitQuant: Data-Agnostic Quantization for Image and Video Diffusion Transformers

Receipt and verification

First computed	2026-06-02T02:04:18.799441Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90959d4d54fc7b1bd722b3d75983dcecc550c732931eedeef759a807c0dbb2f6

Aliases

arxiv: 2605.09503 · arxiv_version: 2605.09503v2 · doi: 10.48550/arxiv.2605.09503 · pith_short_12: SCKZ2TKU7R5R · pith_short_16: SCKZ2TKU7R5RXVZC · pith_short_8: SCKZ2TKU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/SCKZ2TKU7R5RXVZCWPLVTA645T \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 90959d4d54fc7b1bd722b3d75983dcecc550c732931eedeef759a807c0dbb2f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89dd5604c2002a67a55cb5083eb65736dcd9dbddfb035fcb21d6ef526dbfe745",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-05-10T12:26:50Z",
    "title_canon_sha256": "cfdfec046d9e408ceb2326dacfe0e3d66d76b14d219b49053b4cf07042f68767"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.09503",
    "kind": "arxiv",
    "version": 2
  }
}