Pith Number

pith:LHOBOFNF

pith:2001:LHOBOFNFAPWW665EMGUK72YFZO

not attested not anchored not stored refs pending

HI 21cm absorption in low z damped lyman-alpha systems

Jayaram N. Chengalur, Nissim Kanekar

arxiv:astro-ph/0101402 v1 · 2001-01-23 · 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{LHOBOFNFAPWW665EMGUK72YFZO}

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	2026-07-04T16:22:36.618417Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

59dc1715a503ed6f7ba461a8afeb05cb93c01e6235decd9c4f588ff3aa8a2e11

Aliases

arxiv: astro-ph/0101402 · arxiv_version: astro-ph/0101402v1 · doi: 10.48550/arxiv.astro-ph/0101402 · pith_short_12: LHOBOFNFAPWW · pith_short_16: LHOBOFNFAPWW665E · pith_short_8: LHOBOFNF

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/LHOBOFNFAPWW665EMGUK72YFZO \
  | 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: 59dc1715a503ed6f7ba461a8afeb05cb93c01e6235decd9c4f588ff3aa8a2e11

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "547d55872b0a030eb1f54ce2c0c450df96a85b8115a7ab86bb72dd9f41af44a0",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2001-01-23T08:05:46Z",
    "title_canon_sha256": "a8466fc4562a9ee904b4af2064361740cae26c6292b7f88cedb9810ca4807cfa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0101402",
    "kind": "arxiv",
    "version": 1
  }
}