Pith Number

pith:LNUAM2DT

pith:2019:LNUAM2DTXJNPW2NNXDR5SGCUPG

not attested not anchored not stored refs pending

WR 72: a born-again planetary nebula with hydrogen-poor knots

A.Y. Kniazev, G. Graefener, N. Langer, V.V. Gvaramadze

arxiv:1912.11051 v1 · 2019-12-23 · astro-ph.SR · 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{LNUAM2DTXJNPW2NNXDR5SGCUPG}

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	2026-07-05T00:34:50.513781Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5b68066873ba5afb69adb8e3d9185479bc03e2b20efbbd0437d51eea6bf3f420

Aliases

arxiv: 1912.11051 · arxiv_version: 1912.11051v1 · doi: 10.48550/arxiv.1912.11051 · pith_short_12: LNUAM2DTXJNP · pith_short_16: LNUAM2DTXJNPW2NN · pith_short_8: LNUAM2DT

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/LNUAM2DTXJNPW2NNXDR5SGCUPG \
  | 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: 5b68066873ba5afb69adb8e3d9185479bc03e2b20efbbd0437d51eea6bf3f420

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "99e23c9c79bdf5bd6f6bb3aa4a5530ffb55856c7e48b0758830f35c683328d5f",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2019-12-23T19:00:01Z",
    "title_canon_sha256": "d124fbcd6d80424467bb55c830ba529c1204127542f766f547e819f6c92eb63e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1912.11051",
    "kind": "arxiv",
    "version": 1
  }
}