Pith Number

pith:4I5XTQ7R

pith:2009:4I5XTQ7RQWY2NSNWRT564H3POV

not attested not anchored not stored refs pending

The rise of the C IV mass density at z<2.5

Francesco Calura, Matteo Viel, Stefano Cristiani, Valentina D'Odorico

arxiv:0910.2126 v2 · 2009-10-12 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4I5XTQ7RQWY2NSNWRT564H3POV}

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	2026-07-04T17:20:05.572748Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e23b79c3f185b1a6c9b68cfbee1f6f756c9e344dd6d155f3c3e296a8596e8e61

Aliases

arxiv: 0910.2126 · arxiv_version: 0910.2126v2 · doi: 10.48550/arxiv.0910.2126 · pith_short_12: 4I5XTQ7RQWY2 · pith_short_16: 4I5XTQ7RQWY2NSNW · pith_short_8: 4I5XTQ7R

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/4I5XTQ7RQWY2NSNWRT564H3POV \
  | 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: e23b79c3f185b1a6c9b68cfbee1f6f756c9e344dd6d155f3c3e296a8596e8e61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f4aa79ece0d640957d520559759cb8503d461e2bbf4f169b3d188354c7e9fa5d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-10-12T10:17:08Z",
    "title_canon_sha256": "1c470e932c51a88f9f2469c29c202ac6999e4cae73e3f1ede04e9498704f27e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.2126",
    "kind": "arxiv",
    "version": 2
  }
}