Pith Number

pith:NWPYJ37U

pith:2016:NWPYJ37U7YELQV4WICXFH2M4HB

not attested not anchored not stored refs pending

Lessons from Mayan Astronomy

Abraham Loeb (Harvard)

arxiv:1608.01731 v1 · 2016-08-05 · physics.pop-ph · astro-ph.IM · physics.hist-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{NWPYJ37U7YELQV4WICXFH2M4HB}

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	2026-05-18T01:09:44.759019Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d9f84eff4fe08b8579640ae53e99c386474c2c0d1913cd5dd102287eaaa5db1

Aliases

arxiv: 1608.01731 · arxiv_version: 1608.01731v1 · doi: 10.48550/arxiv.1608.01731 · pith_short_12: NWPYJ37U7YEL · pith_short_16: NWPYJ37U7YELQV4W · pith_short_8: NWPYJ37U

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/NWPYJ37U7YELQV4WICXFH2M4HB \
  | 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: 6d9f84eff4fe08b8579640ae53e99c386474c2c0d1913cd5dd102287eaaa5db1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5309cc8593965bb601a2f6347ac692cd85359e875e525a044ae3df55b26cbc0",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "physics.hist-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2016-08-05T01:00:43Z",
    "title_canon_sha256": "686729a4dc3f7d855390b56a3f2dc3eea342740d21b27b6d5a1159809af90b10"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.01731",
    "kind": "arxiv",
    "version": 1
  }
}