Pith Number

pith:FYVHAKNZ

pith:2019:FYVHAKNZFR2J62QXIOZZBX4ISD

not attested not anchored not stored refs pending

Actinide-rich and Actinide-poor $r$-Process Enhanced Metal-Poor Stars do not Require Separate $r$-Process Progenitors

Anna Frebel, Erika M. Holmbeck, G. C. McLaughlin, Matthew R. Mumpower, Rebecca Surman, Trevor M. Sprouse

arxiv:1904.02139 v2 · 2019-04-03 · astro-ph.HE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FYVHAKNZFR2J62QXIOZZBX4ISD}

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	2026-07-04T23:55:39.361840Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e2a7029b92c749f6a1743b390df8890c17318e892e1f9bcd977b59dc291c1c6

Aliases

arxiv: 1904.02139 · arxiv_version: 1904.02139v2 · doi: 10.48550/arxiv.1904.02139 · pith_short_12: FYVHAKNZFR2J · pith_short_16: FYVHAKNZFR2J62QX · pith_short_8: FYVHAKNZ

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/FYVHAKNZFR2J62QXIOZZBX4ISD \
  | 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: 2e2a7029b92c749f6a1743b390df8890c17318e892e1f9bcd977b59dc291c1c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34e8984d9e02b4288a52802c5b2f174da88772b134b660e8a96ceeab4c6bbe41",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.HE",
    "submitted_at": "2019-04-03T17:55:11Z",
    "title_canon_sha256": "5b4d9e41022f1ba3d6038a66fcb63b5521d5542132d62c014cd6ecb87422d1f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.02139",
    "kind": "arxiv",
    "version": 2
  }
}