Pith Number

pith:HR5DTDV2

pith:2013:HR5DTDV2SMWHCMH3TQZU6QRGD7

not attested not anchored not stored refs pending

Breaking through the high redshift bottleneck of Observational Hubble parameter Data: The Sandage-Loeb signal Scheme

Shuo Yuan, Siqi Liu, Tong-Jie Zhang

arxiv:1311.1583 v4 · 2013-11-07 · 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{HR5DTDV2SMWHCMH3TQZU6QRGD7}

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	2026-05-18T01:46:37.976457Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3c7a398eba932c7130fb9c334f42261ff8b68c0e36b29369c3b56f1370760f22

Aliases

arxiv: 1311.1583 · arxiv_version: 1311.1583v4 · doi: 10.48550/arxiv.1311.1583 · pith_short_12: HR5DTDV2SMWH · pith_short_16: HR5DTDV2SMWHCMH3 · pith_short_8: HR5DTDV2

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/HR5DTDV2SMWHCMH3TQZU6QRGD7 \
  | 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: 3c7a398eba932c7130fb9c334f42261ff8b68c0e36b29369c3b56f1370760f22

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf6121df8f96cea03bbb6f77c8b00b56307b8656cdb092b3848923abc8c0e7a9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-11-07T06:14:06Z",
    "title_canon_sha256": "59628f13523a2d036deb593b06ceb163c8991545c3f770e238a8ef6f323ebb14"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.1583",
    "kind": "arxiv",
    "version": 4
  }
}