Pith Number

pith:VOHF2E3L

pith:2015:VOHF2E3L4NGNJIFWL2RQ6HZWPJ

not attested not anchored not stored refs pending

The Reflecting Heliometer of Rio de Janeiro after 6 Years of Activity

Alexandre H. Andrei, Costantino Sigismondi, Eugenio Reis-Neto, Jucira L. Penna, Sergio C. Boscardin, Victor d'Avila

arxiv:1512.03358 v1 · 2015-12-10 · astro-ph.IM · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VOHF2E3L4NGNJIFWL2RQ6HZWPJ}

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	2026-05-18T00:53:08.662241Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ab8e5d136be34cd4a0b65ea30f1f367a7c81415eab8efcc19bbb0476beeadb35

Aliases

arxiv: 1512.03358 · arxiv_version: 1512.03358v1 · doi: 10.48550/arxiv.1512.03358 · pith_short_12: VOHF2E3L4NGN · pith_short_16: VOHF2E3L4NGNJIFW · pith_short_8: VOHF2E3L

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/VOHF2E3L4NGNJIFWL2RQ6HZWPJ \
  | 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: ab8e5d136be34cd4a0b65ea30f1f367a7c81415eab8efcc19bbb0476beeadb35

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5921d0f264d7b93df1c38d8caf6ee12cd0979769cfff60b99ef4c5c16759abb",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2015-12-10T18:19:18Z",
    "title_canon_sha256": "f409a46472de5ec6d3b61ec0c1812070b8173134419a5b1de4ea5e33077190d9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1512.03358",
    "kind": "arxiv",
    "version": 1
  }
}