Pith Number

pith:YEF2FVF6

pith:2005:YEF2FVF64KNWEQGQRXNDLEQK2R

not attested not anchored not stored refs pending

Metallicity and HI Column Density Properties of Damped Lyman-$\alpha$ Systems

C.G. Shu, C.Q. Fu, J.L. Hou, R.X. Chang, S.Y. Shen, W. P. Chen

arxiv:astro-ph/0501603 v1 · 2005-01-27 · 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{YEF2FVF64KNWEQGQRXNDLEQK2R}

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	2026-05-18T01:40:34.519436Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c10ba2d4bee29b6240d08dda35920ad46b36c95a0c9e02867947eba9b147f6dd

Aliases

arxiv: astro-ph/0501603 · arxiv_version: astro-ph/0501603v1 · doi: 10.48550/arxiv.astro-ph/0501603 · pith_short_12: YEF2FVF64KNW · pith_short_16: YEF2FVF64KNWEQGQ · pith_short_8: YEF2FVF6

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/YEF2FVF64KNWEQGQRXNDLEQK2R \
  | 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: c10ba2d4bee29b6240d08dda35920ad46b36c95a0c9e02867947eba9b147f6dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ebe8f76a9334325a28dbd262851ec5c69c4cea38dfb99fb92d11e451b5691890",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2005-01-27T13:11:40Z",
    "title_canon_sha256": "02409524f267d31de2f175d90a41f0189a93f0daee0f5d9ffce86e892dd03bfc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0501603",
    "kind": "arxiv",
    "version": 1
  }
}