Pith Number

pith:DFNZ3SIY

pith:2003:DFNZ3SIYIZRCXRU5Z3GIT3V7GQ

not attested not anchored not stored refs pending

Physical properties of DLA metallicity and neutral hydrogen column density

2), CAS, C.G. Shu (1, China), China; (2) Graduate Institute of Astronomy, C.Q. Fu (1) ((1) Shanghai Astronomical Observatory, J.L. Hou (1), National Central University, R.X. Chang (1), Shanghai, Taiwan, W.P. Chen (2)

arxiv:astro-ph/0310397 v1 · 2003-10-15 · 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{DFNZ3SIYIZRCXRU5Z3GIT3V7GQ}

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	2026-05-18T01:08:59.217254Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

195b9dc91846622bc69dcecc89eebf34247b497ba882be730af0838ab110d553

Aliases

arxiv: astro-ph/0310397 · arxiv_version: astro-ph/0310397v1 · doi: 10.48550/arxiv.astro-ph/0310397 · pith_short_12: DFNZ3SIYIZRC · pith_short_16: DFNZ3SIYIZRCXRU5 · pith_short_8: DFNZ3SIY

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/DFNZ3SIYIZRCXRU5Z3GIT3V7GQ \
  | 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: 195b9dc91846622bc69dcecc89eebf34247b497ba882be730af0838ab110d553

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1067babeecaa3a64c9a837d2ee21fd5643c7d733b020f632dedea1eaeb62128",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-10-15T06:52:28Z",
    "title_canon_sha256": "ee217d8982fc95c1967058d3e8703dab11a87ae77d4c22525c5510f28092ea25"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0310397",
    "kind": "arxiv",
    "version": 1
  }
}