Pith Number

pith:DM4AD2FX

pith:2009:DM4AD2FXK6LZZSJZ3E5T6HKS67

not attested not anchored not stored refs pending

A view of the Galactic halo using beryllium as a time scale

B. Barbuy, D. Galli, L. Pasquini, P. Bonifacio, R. Gratton, Rodolfo Smiljanic, S. Randich

arxiv:0909.2635 v1 · 2009-09-14 · astro-ph.GA · 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{DM4AD2FXK6LZZSJZ3E5T6HKS67}

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	2026-05-18T02:11:47.979238Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1b3801e8b757979cc939d93b3f1d52f7c1879f93fe5e02eff9260349b7b185d4

Aliases

arxiv: 0909.2635 · arxiv_version: 0909.2635v1 · doi: 10.48550/arxiv.0909.2635 · pith_short_12: DM4AD2FXK6LZ · pith_short_16: DM4AD2FXK6LZZSJZ · pith_short_8: DM4AD2FX

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/DM4AD2FXK6LZZSJZ3E5T6HKS67 \
  | 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: 1b3801e8b757979cc939d93b3f1d52f7c1879f93fe5e02eff9260349b7b185d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c13b329175f4a974d892043ff27d97ea906549d044e4f4d9e6f743fa196e671",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2009-09-14T19:57:32Z",
    "title_canon_sha256": "156bfaf7c64e0201c316f403065189636832fbbce2f9ca7b4a9d6d57c54115dc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.2635",
    "kind": "arxiv",
    "version": 1
  }
}