Pith Number

pith:U26IAXPO

pith:1994:U26IAXPOARVXTY5G5YIFZOXE5R

not attested not anchored not stored refs pending

From the Owl to the Eskimo: the Radiation-Gasdynamics of Planetary Nebulae IV

Adam Frank, Garrelt Mellema

arxiv:astro-ph/9404077 v1 · 1994-04-29 · 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{U26IAXPOARVXTY5G5YIFZOXE5R}

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	2026-05-18T00:09:56.223496Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6bc805dee046b79e3a6ee105cbae4ec45fade0308fd0725b8711a1b8b26a906

Aliases

arxiv: astro-ph/9404077 · arxiv_version: astro-ph/9404077v1 · doi: 10.48550/arxiv.astro-ph/9404077 · pith_short_12: U26IAXPOARVX · pith_short_16: U26IAXPOARVXTY5G · pith_short_8: U26IAXPO

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/U26IAXPOARVXTY5G5YIFZOXE5R \
  | 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: a6bc805dee046b79e3a6ee105cbae4ec45fade0308fd0725b8711a1b8b26a906

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f41b2709399781eb5d9f7542200ef353a37ee1e0f99bb8daf698f816b1500684",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1994-04-29T15:57:15Z",
    "title_canon_sha256": "c64127363ad055fd0f0fefbb25096def4a82eb4cf5a49bb36d7442b0a6d888af"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9404077",
    "kind": "arxiv",
    "version": 1
  }
}