Pith Number

pith:BRN75I6R

pith:2026:BRN75I6REB6LAJPXQOXPUIBTPR

not attested not anchored not stored refs pending

The age of the Universe from a large sample of the oldest Galactic stars

Harry Desmond, Indranil Banik, Stephen Cookson, Thenujaya Kudakolawa Kaluarachchige

arxiv:2607.00764 v1 · 2026-07-01 · astro-ph.CO · 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{BRN75I6REB6LAJPXQOXPUIBTPR}

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	2026-07-02T01:17:54.758206Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c5bfea3d1207cb025f783aefa20337c622e6484390e53154a774f0aecb7d747

Aliases

arxiv: 2607.00764 · arxiv_version: 2607.00764v1 · doi: 10.48550/arxiv.2607.00764 · pith_short_12: BRN75I6REB6L · pith_short_16: BRN75I6REB6LAJPX · pith_short_8: BRN75I6R

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/BRN75I6REB6LAJPXQOXPUIBTPR \
  | 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: 0c5bfea3d1207cb025f783aefa20337c622e6484390e53154a774f0aecb7d747

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f8f2fbdbc4c13a52f6aa91cc04f44f4ba572185a34f2dea91d4de7915bdce78",
    "cross_cats_sorted": [
      "astro-ph.GA",
      "astro-ph.SR"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2026-07-01T10:48:01Z",
    "title_canon_sha256": "4ab187567c029a7993fdfa7235cb4fdc9389e796364c0f6acee4cd9e9ebb9df5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.00764",
    "kind": "arxiv",
    "version": 1
  }
}