Pith Number

pith:H7YRMOLJ

pith:2001:H7YRMOLJCGPVN4VHV5F6D5QUTR

not attested not anchored not stored refs pending

Hydrogen-poor planetary nebulae

Albert A. Zijlstra

arxiv:astro-ph/0105448 v1 · 2001-05-25 · astro-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{H7YRMOLJCGPVN4VHV5F6D5QUTR}

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.

Cited by

1 paper in Pith

Infrared properties of Planetary Nebulae with PG1159 central stars

Receipt and verification

First computed	2026-07-04T14:11:16.654576Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ff1163969119f56f2a7af4be1f6149c763d8cac948307aed38bc605d1367302

Aliases

arxiv: astro-ph/0105448 · arxiv_version: astro-ph/0105448v1 · doi: 10.48550/arxiv.astro-ph/0105448 · pith_short_12: H7YRMOLJCGPV · pith_short_16: H7YRMOLJCGPVN4VH · pith_short_8: H7YRMOLJ

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/H7YRMOLJCGPVN4VHV5F6D5QUTR \
  | 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: 3ff1163969119f56f2a7af4be1f6149c763d8cac948307aed38bc605d1367302

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "699d22b24d74ea6af29304eb58dbd4b9e4dce50a79d79fa2e7c2394e7e3c64c6",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-05-25T10:25:17Z",
    "title_canon_sha256": "f402a34149086ba67a9b34174c3f24fd8a1f5dcc2c6b162029e20a16136a259a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0105448",
    "kind": "arxiv",
    "version": 1
  }
}