Pith Number

pith:EJ7VEH5Y

pith:2010:EJ7VEH5YBMY6NO2G42MBKCLLZT

not attested not anchored not stored refs pending

Archaeoastronomy in India

Subhash Kak

arxiv:1002.4513 v2 · 2010-02-24 · physics.gen-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{EJ7VEH5YBMY6NO2G42MBKCLLZT}

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	2026-05-18T03:37:27.777846Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

227f521fb80b31e6bb46e69815096bccd5566ed2f356f0bb86abfc7d605c91b6

Aliases

arxiv: 1002.4513 · arxiv_version: 1002.4513v2 · doi: 10.48550/arxiv.1002.4513 · pith_short_12: EJ7VEH5YBMY6 · pith_short_16: EJ7VEH5YBMY6NO2G · pith_short_8: EJ7VEH5Y

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/EJ7VEH5YBMY6NO2G42MBKCLLZT \
  | 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: 227f521fb80b31e6bb46e69815096bccd5566ed2f356f0bb86abfc7d605c91b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ddcaaf4a9fb43b7eaf5f823b8beef75623e588bf5e7b3a2ec68ba2f456bb2569",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2010-02-24T19:35:51Z",
    "title_canon_sha256": "d4e27a269df9cb897e933adbfb0977b2a552530d0252dffaf8aea3e053aa0c57"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1002.4513",
    "kind": "arxiv",
    "version": 2
  }
}