Pith Number

pith:CQSVTXTH

pith:1999:CQSVTXTHVQYTHF3WHRRSCIKLHY

not attested not anchored not stored refs pending

The HI Column Density Distribution Function at z=0: the Connection to Damped Ly alpha Statistics

(2) NRAO), Frank Briggs (1) ((1) Kapteyn Institute, Groningen, Marc Verheijen (2), Martin Zwaan (1)

arxiv:astro-ph/9902171 v1 · 1999-02-11 · 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{CQSVTXTHVQYTHF3WHRRSCIKLHY}

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	2026-05-18T01:40:13.401838Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

142559de67ac313397763c6321214b3e08f97745e7360081185e67ffc25ed6cb

Aliases

arxiv: astro-ph/9902171 · arxiv_version: astro-ph/9902171v1 · doi: 10.48550/arxiv.astro-ph/9902171 · pith_short_12: CQSVTXTHVQYT · pith_short_16: CQSVTXTHVQYTHF3W · pith_short_8: CQSVTXTH

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/CQSVTXTHVQYTHF3WHRRSCIKLHY \
  | 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: 142559de67ac313397763c6321214b3e08f97745e7360081185e67ffc25ed6cb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a4f59722e72f54a5e42439256d9f1ca137de769381d15d5acc558a782ed609b",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-02-11T10:49:48Z",
    "title_canon_sha256": "6411bd5c7b590a5e27424aee43c730bcda9ef8f1fc2ca75b8fb7d5675ae836d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9902171",
    "kind": "arxiv",
    "version": 1
  }
}