Pith Number

pith:OGVLX4FJ

pith:2008:OGVLX4FJ64Q3CRN7R2PWBJZAIL

not attested not anchored not stored refs pending

Exploiting Low-Dimensional Structure in Astronomical Spectra

Ann B. Lee, Chad M. Schafer, Joseph W. Richards, Peter E. Freeman

arxiv:0807.2900 v1 · 2008-07-18 · astro-ph · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OGVLX4FJ64Q3CRN7R2PWBJZAIL}

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	2026-05-18T04:29:33.198028Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

71aabbf0a9f721b145bf8e9f60a72042c08fef5b04d8cf227b32ed7edf0384d1

Aliases

arxiv: 0807.2900 · arxiv_version: 0807.2900v1 · doi: 10.48550/arxiv.0807.2900 · pith_short_12: OGVLX4FJ64Q3 · pith_short_16: OGVLX4FJ64Q3CRN7 · pith_short_8: OGVLX4FJ

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/OGVLX4FJ64Q3CRN7R2PWBJZAIL \
  | 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: 71aabbf0a9f721b145bf8e9f60a72042c08fef5b04d8cf227b32ed7edf0384d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c70cfcebf68f9743551736d67bf3ff0b69511d4124119f41aa73a77655f5e516",
    "cross_cats_sorted": [
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph",
    "submitted_at": "2008-07-18T04:13:23Z",
    "title_canon_sha256": "275468c665666ec7f6e608fd8cced7a8284ba7858b22d2a4580d377d2f1e05f8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0807.2900",
    "kind": "arxiv",
    "version": 1
  }
}