Pith Number

pith:W3DPPY4A

pith:2008:W3DPPY4ADG2RW2PH24JPKGYVYU

not attested not anchored not stored refs pending

Nonlinear aspects of astrobiological research

Axel Brandenburg

arxiv:0809.0261 v1 · 2008-09-01 · q-bio.BM · astro-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{W3DPPY4ADG2RW2PH24JPKGYVYU}

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	2026-05-18T04:18:54.863381Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b6c6f7e38019b51b69e7d712f51b15c51025cec37e66ebc2eef5a21a24391e33

Aliases

arxiv: 0809.0261 · arxiv_version: 0809.0261v1 · doi: 10.48550/arxiv.0809.0261 · pith_short_12: W3DPPY4ADG2R · pith_short_16: W3DPPY4ADG2RW2PH · pith_short_8: W3DPPY4A

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/W3DPPY4ADG2RW2PH24JPKGYVYU \
  | 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: b6c6f7e38019b51b69e7d712f51b15c51025cec37e66ebc2eef5a21a24391e33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cd5061016efbdc3ce9581f2901c4169a780d762499687174cd8fb257c95a91ed",
    "cross_cats_sorted": [
      "astro-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "q-bio.BM",
    "submitted_at": "2008-09-01T15:03:18Z",
    "title_canon_sha256": "e09417f9b854bbe5dc127868ad182d891d34d821740ff21be17dbfb55a8660fd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.0261",
    "kind": "arxiv",
    "version": 1
  }
}