Pith Number

pith:PZ2DFQ35

pith:2018:PZ2DFQ355BCH2PMBFCZI5TVRCB

not attested not anchored not stored refs pending

The Origin of r-process Enhanced Metal-Poor Halo Stars In Now-Destroyed Ultra-Faint Dwarf Galaxies

Alexander P. Ji, Anna Frebel, Brian W. O'Shea, Facundo A. Gomez, Gregory A. Dooley, Kaley Brauer

arxiv:1809.05539 v2 · 2018-09-14 · 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{PZ2DFQ355BCH2PMBFCZI5TVRCB}

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	2026-05-17T23:54:39.251215Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7e7432c37de8447d3d8128b28eceb11047fedb08725e0b52be2f50390764f9c4

Aliases

arxiv: 1809.05539 · arxiv_version: 1809.05539v2 · doi: 10.48550/arxiv.1809.05539 · pith_short_12: PZ2DFQ355BCH · pith_short_16: PZ2DFQ355BCH2PMB · pith_short_8: PZ2DFQ35

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/PZ2DFQ355BCH2PMBFCZI5TVRCB \
  | 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: 7e7432c37de8447d3d8128b28eceb11047fedb08725e0b52be2f50390764f9c4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d77ab16776370865a7c4030c42a2b30174d7f1ad5c11182feb85dca6cba5b6b1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2018-09-14T18:00:04Z",
    "title_canon_sha256": "bcce430525fe39c09226d4e38826e8591f4893d71710bae28bfd05d5c7ddfcbe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.05539",
    "kind": "arxiv",
    "version": 2
  }
}