Pith Number

pith:2ZY4FOKK

pith:2013:2ZY4FOKKYWS4QEK3KNKOITNBBW

not attested not anchored not stored refs pending

RadioAstron: An Earth-Space Radio Interferometer with a 350,000 km Baseline

K. I. Kellermann (NRAO), N. S. Kardashev (ASC Lebedev), Y. Y. Kovalev (ASC Lebedev)

arxiv:1303.5200 v1 · 2013-03-21 · astro-ph.IM · astro-ph.CO · astro-ph.GA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2ZY4FOKKYWS4QEK3KNKOITNBBW}

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	2026-05-18T03:30:13.647424Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d671c2b94ac5a5c8115b5354e44da10daef3e41135301595bc9d916c9a6fb9f4

Aliases

arxiv: 1303.5200 · arxiv_version: 1303.5200v1 · doi: 10.48550/arxiv.1303.5200 · pith_short_12: 2ZY4FOKKYWS4 · pith_short_16: 2ZY4FOKKYWS4QEK3 · pith_short_8: 2ZY4FOKK

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/2ZY4FOKKYWS4QEK3KNKOITNBBW \
  | 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: d671c2b94ac5a5c8115b5354e44da10daef3e41135301595bc9d916c9a6fb9f4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "042205cfc3e8f89be9e6deedd7414d2eddc750903bd714393364fa86c7571790",
    "cross_cats_sorted": [
      "astro-ph.CO",
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2013-03-21T09:25:14Z",
    "title_canon_sha256": "779763557c03492e012df07f0cacb638c9558160c633ae087325cca265065043"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.5200",
    "kind": "arxiv",
    "version": 1
  }
}