Pith Number

pith:2HRHERJH

pith:2018:2HRHERJH2BNZ5OW7NRZK7IRLV2

not attested not anchored not stored refs pending

Determining JPEG Image Standard Quality Factor from the Quantization Tables

R\'emi Cogranne

arxiv:1802.00992 v1 · 2018-02-03 · eess.IV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2HRHERJH2BNZ5OW7NRZK7IRLV2}

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.

Receipt and verification

First computed	2026-05-18T00:24:27.679618Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1e2724527d05b9ebadf6c72afa22bae82704d5650696f4a552ff5b19abd2524

Aliases

arxiv: 1802.00992 · arxiv_version: 1802.00992v1 · doi: 10.48550/arxiv.1802.00992 · pith_short_12: 2HRHERJH2BNZ · pith_short_16: 2HRHERJH2BNZ5OW7 · pith_short_8: 2HRHERJH

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/2HRHERJH2BNZ5OW7NRZK7IRLV2 \
  | 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: d1e2724527d05b9ebadf6c72afa22bae82704d5650696f4a552ff5b19abd2524

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f46e86eca4615ad013b9b8aeec0b7a3389cc24af58704d04d62b510966bf721",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "eess.IV",
    "submitted_at": "2018-02-03T15:48:43Z",
    "title_canon_sha256": "ffc697d12155fc1a8abf7cb751b96d732621402983fd2124c5664f8017cc016f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1802.00992",
    "kind": "arxiv",
    "version": 1
  }
}