Pith Number

pith:R4PE5NFE

pith:2013:R4PE5NFE3ZUSX25K4DADLZLIUT

not attested not anchored not stored refs pending

Spyhoppers and Stargazers: Can Whales See the Stars?

Michael J. West

arxiv:1309.2722 v1 · 2013-09-11 · physics.pop-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{R4PE5NFE3ZUSX25K4DADLZLIUT}

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	2026-05-18T03:13:35.094461Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8f1e4eb4a4de692bebaae0c035e568a4dd5fb7ba2bd06e1e7500e88fa7860461

Aliases

arxiv: 1309.2722 · arxiv_version: 1309.2722v1 · doi: 10.48550/arxiv.1309.2722 · pith_short_12: R4PE5NFE3ZUS · pith_short_16: R4PE5NFE3ZUSX25K · pith_short_8: R4PE5NFE

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/R4PE5NFE3ZUSX25K4DADLZLIUT \
  | 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: 8f1e4eb4a4de692bebaae0c035e568a4dd5fb7ba2bd06e1e7500e88fa7860461

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78a719ef5444466f9f06de2546a2e77d3db92fbe4cb522cceee8fb8c89cd1fb3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2013-09-11T03:01:48Z",
    "title_canon_sha256": "7b79e5fc1e955b3e7ab3c3d2e39d14662a6be7b63c858ec61f8e7dfea2e4045e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.2722",
    "kind": "arxiv",
    "version": 1
  }
}