Pith Number

pith:UL26C3FZ

pith:2000:UL26C3FZ4ST4S43LT3Q4RIBD7I

not attested not anchored not stored refs pending

Cluster Mass Reconstruction by a Weak Shear Field

Keiichi Umetsu, Masashi Tada, Toshifumi Futamase

arxiv:astro-ph/0004400 v2 · 2000-04-28 · 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{UL26C3FZ4ST4S43LT3Q4RIBD7I}

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	2026-05-18T01:07:46.726093Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a2f5e16cb9e4a7c9736b9ee1c8a023fa2a3644ab0a33a470a72877112e25f734

Aliases

arxiv: astro-ph/0004400 · arxiv_version: astro-ph/0004400v2 · doi: 10.48550/arxiv.astro-ph/0004400 · pith_short_12: UL26C3FZ4ST4 · pith_short_16: UL26C3FZ4ST4S43L · pith_short_8: UL26C3FZ

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/UL26C3FZ4ST4S43LT3Q4RIBD7I \
  | 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: a2f5e16cb9e4a7c9736b9ee1c8a023fa2a3644ab0a33a470a72877112e25f734

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10466747dbb359c51bc94b94638a23099651c83dbfc0165e3d7b42b817087a7d",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-04-28T16:39:17Z",
    "title_canon_sha256": "93ebd50d412f452e450414c10ba3ffe75ddf33c285ea5319d486d12e6f273cf1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0004400",
    "kind": "arxiv",
    "version": 2
  }
}