Pith Number

pith:U5ALZEBS

pith:2011:U5ALZEBSLVJQS2GL3OGWLNI6F3

not attested not anchored not stored refs pending

A conjugate gradient algorithm for the astrometric core solution of Gaia

(2) Lund Observatory, (3) ESAC, Alex Bombrun (1), Berry Holl (2), David Hobbs (2), Germany, Germany), Heidelberg, Lennart Lindegren (2), Madrid, Sweden, Ulrich Bastian (1) ((1) ARI, Uwe Lammers (3)

arxiv:1112.4165 v1 · 2011-12-18 · 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{U5ALZEBSLVJQS2GL3OGWLNI6F3}

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	2026-05-18T04:06:06.918380Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a740bc90325d530968cbdb8d65b51e2ed2a3312afd61f7a36e9dece46066e803

Aliases

arxiv: 1112.4165 · arxiv_version: 1112.4165v1 · doi: 10.48550/arxiv.1112.4165 · pith_short_12: U5ALZEBSLVJQ · pith_short_16: U5ALZEBSLVJQS2GL · pith_short_8: U5ALZEBS

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/U5ALZEBSLVJQS2GL3OGWLNI6F3 \
  | 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: a740bc90325d530968cbdb8d65b51e2ed2a3312afd61f7a36e9dece46066e803

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7e19fd435d9c472bc498430670aadf5a1ac1b3e84f3a1e6e7152645f12f699d0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2011-12-18T15:56:25Z",
    "title_canon_sha256": "f3753cbcb6aef6215c1fb9963dae6f6b8bc75de2d52e92257c0eaa2cd9cca08e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.4165",
    "kind": "arxiv",
    "version": 1
  }
}