Pith Number

pith:L5SW4TAK

pith:2012:L5SW4TAK72YLFDBQR3UOO5Y6TS

not attested not anchored not stored refs pending

From Cosmos to Intelligent Life: The Four Ages of Astrobiology

Marcelo Gleiser

arxiv:1202.5042 v2 · 2012-02-22 · physics.pop-ph · astro-ph.EP · q-bio.BM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{L5SW4TAK72YLFDBQR3UOO5Y6TS}

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	2026-05-18T01:58:20.563366Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f656e4c0afeb0b28c308ee8e7771e9caaae369f130531e4489d34cee57e68d5

Aliases

arxiv: 1202.5042 · arxiv_version: 1202.5042v2 · doi: 10.48550/arxiv.1202.5042 · pith_short_12: L5SW4TAK72YL · pith_short_16: L5SW4TAK72YLFDBQ · pith_short_8: L5SW4TAK

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/L5SW4TAK72YLFDBQR3UOO5Y6TS \
  | 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: 5f656e4c0afeb0b28c308ee8e7771e9caaae369f130531e4489d34cee57e68d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2fd2bfb5cd46d9392b427b0fecb6f4e9ec8636ee78f4a5bb1ee5176fdd7987cf",
    "cross_cats_sorted": [
      "astro-ph.EP",
      "q-bio.BM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2012-02-22T21:02:14Z",
    "title_canon_sha256": "e182c7bacd4105d70c66657aeb71844d435021d41777497a81a8e38812699245"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.5042",
    "kind": "arxiv",
    "version": 2
  }
}