Pith Number

pith:ZYPRYZQI

pith:2013:ZYPRYZQIIHNPOKKY7KGZGTWLPZ

not attested not anchored not stored refs pending

Can very compact and very massive neutron stars both exist?

Alessandro Drago, Andrea Lavagno, Giuseppe Pagliara

arxiv:1309.7263 v2 · 2013-09-27 · nucl-th · astro-ph.SR · hep-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZYPRYZQIIHNPOKKY7KGZGTWLPZ}

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	2026-05-18T02:55:20.454718Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ce1f1c660841daf72958fa8d934ecb7e647518bbdd1120048134dfe4b8ec378f

Aliases

arxiv: 1309.7263 · arxiv_version: 1309.7263v2 · doi: 10.48550/arxiv.1309.7263 · pith_short_12: ZYPRYZQIIHNP · pith_short_16: ZYPRYZQIIHNPOKKY · pith_short_8: ZYPRYZQI

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/ZYPRYZQIIHNPOKKY7KGZGTWLPZ \
  | 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: ce1f1c660841daf72958fa8d934ecb7e647518bbdd1120048134dfe4b8ec378f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28b4fa54edeb892ef51a8eabc3f45230fefc668a53555175547c064c37bbab18",
    "cross_cats_sorted": [
      "astro-ph.SR",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "nucl-th",
    "submitted_at": "2013-09-27T15:07:14Z",
    "title_canon_sha256": "25df421685865dab4cc81760affcb92aa14b8b6d8bcfd7d74adf1db5fb10c328"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.7263",
    "kind": "arxiv",
    "version": 2
  }
}