Pith Number

pith:YWE2TM2H

pith:2025:YWE2TM2H3GAVNJ3FLOIYNCLVPA

not attested not anchored not stored refs pending

The secular evolution of planetary nebula IC 418 and its implications for carbon star formation

Albert A. Zijlstra, Quentin A. Parker

arxiv:2508.14752 v1 · 2025-08-20 · 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{YWE2TM2H3GAVNJ3FLOIYNCLVPA}

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	2026-07-05T11:56:38.018298Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c589a9b347d98156a7655b918689757801d82b556c0e5d6bdc341fbf0162f834

Aliases

arxiv: 2508.14752 · arxiv_version: 2508.14752v1 · doi: 10.48550/arxiv.2508.14752 · pith_short_12: YWE2TM2H3GAV · pith_short_16: YWE2TM2H3GAVNJ3F · pith_short_8: YWE2TM2H

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/YWE2TM2H3GAVNJ3FLOIYNCLVPA \
  | 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: c589a9b347d98156a7655b918689757801d82b556c0e5d6bdc341fbf0162f834

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f98a86d2bb036509be521d6c0c9a3a23b65ad4e28c6bee3652f20f88f5bd74d7",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.SR",
    "submitted_at": "2025-08-20T14:52:56Z",
    "title_canon_sha256": "ff400cf906e78522a675adaf1347de7a50a484d88d8dd0621ecfe0f3eda8c156"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2508.14752",
    "kind": "arxiv",
    "version": 1
  }
}