Pith Number

pith:Z5ZGNX37

pith:2013:Z5ZGNX37VQ7YKMGF53GHEFK43C

not attested not anchored not stored refs pending

Diurnal astronomy: using sticks and threads to find our latitude on Earth

Alejandro Gangui, Nestor Camino

arxiv:1305.5864 v1 · 2013-05-24 · physics.pop-ph · astro-ph.IM · physics.ed-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{Z5ZGNX37VQ7YKMGF53GHEFK43C}

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	2026-05-18T01:49:46.660649Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf7266df7fac3f8530c5eecc72155cd8b18eb0ad2547d5377de1b39b79bb3329

Aliases

arxiv: 1305.5864 · arxiv_version: 1305.5864v1 · doi: 10.48550/arxiv.1305.5864 · pith_short_12: Z5ZGNX37VQ7Y · pith_short_16: Z5ZGNX37VQ7YKMGF · pith_short_8: Z5ZGNX37

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/Z5ZGNX37VQ7YKMGF53GHEFK43C \
  | 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: cf7266df7fac3f8530c5eecc72155cd8b18eb0ad2547d5377de1b39b79bb3329

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dfc3541845e81dcf710a5f77f1bd7a2ddb8608268045ec2ff9f798309982b64c",
    "cross_cats_sorted": [
      "astro-ph.IM",
      "physics.ed-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2013-05-24T22:24:36Z",
    "title_canon_sha256": "dccb1ca6f194c5965adc01d134e982402f6c02c237eb57d06b7fe25d623b8d04"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.5864",
    "kind": "arxiv",
    "version": 1
  }
}