Pith Number

pith:YKEWC3TD

pith:2004:YKEWC3TDPIVHEXZMOWPZQ7CXN5

not attested not anchored not stored refs pending

Evolution of Chemistry and Molecular Line Profile during Protostellar Collapse

Edwin A. Bergin, Jeong-Eun Lee, Neal J. Evans II

arxiv:astro-ph/0408091 v1 · 2004-08-04 · 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{YKEWC3TDPIVHEXZMOWPZQ7CXN5}

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	2026-07-04T16:44:26.557778Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c289616e637a2a725f2c759f987c576f6d096b7dc1038b398e4536d396b870f5

Aliases

arxiv: astro-ph/0408091 · arxiv_version: astro-ph/0408091v1 · doi: 10.48550/arxiv.astro-ph/0408091 · pith_short_12: YKEWC3TDPIVH · pith_short_16: YKEWC3TDPIVHEXZM · pith_short_8: YKEWC3TD

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/YKEWC3TDPIVHEXZMOWPZQ7CXN5 \
  | 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: c289616e637a2a725f2c759f987c576f6d096b7dc1038b398e4536d396b870f5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7ec0fc6b754efaa7e7242dfa4ab98e7b05224cfa66522d5cec4470a3fadd1be4",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-08-04T17:57:22Z",
    "title_canon_sha256": "c2ec865f65a4316b249b33d69193ed1a6b60d5ed258d9c912dea92a07c93454e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0408091",
    "kind": "arxiv",
    "version": 1
  }
}