Pith Number

pith:GFL4DLKW

pith:2010:GFL4DLKWATQIGG2ESQ2OH7IWZX

not attested not anchored not stored refs pending

The future of VLBI has begun!

(2) Sterrewacht Leiden, Huib van Langevelde (1 & 2)((1) Joint Institute for VLBI in Europe, Leiden University)

arxiv:1009.2911 v1 · 2010-09-15 · astro-ph.IM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GFL4DLKWATQIGG2ESQ2OH7IWZX}

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	2026-05-18T04:40:55.277488Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3157c1ad5604e0831b449434e3fd16cdc337086806bb74a8017365dd93ef1810

Aliases

arxiv: 1009.2911 · arxiv_version: 1009.2911v1 · doi: 10.48550/arxiv.1009.2911 · pith_short_12: GFL4DLKWATQI · pith_short_16: GFL4DLKWATQIGG2E · pith_short_8: GFL4DLKW

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/GFL4DLKWATQIGG2ESQ2OH7IWZX \
  | 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: 3157c1ad5604e0831b449434e3fd16cdc337086806bb74a8017365dd93ef1810

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5b54359ca7bb23c38c4503c5cd5863e5313082144663db7dc7a4aab4cdbd467e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2010-09-15T12:41:37Z",
    "title_canon_sha256": "026c91d00cb4fcc1d6abde2a98a10f794fb12e0d32f8fc704a8dc0679ae3458a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.2911",
    "kind": "arxiv",
    "version": 1
  }
}