Pith Number

pith:2SFVKTY6

pith:2015:2SFVKTY6ID6NNFQQCIMLPBIWFI

not attested not anchored not stored refs pending

Determining $H_0$ using a model-independent method

Hongwei Yu, Puxun Wu, Zhengxiang Li

arxiv:1501.01818 v2 · 2015-01-08 · astro-ph.CO · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2SFVKTY6ID6NNFQQCIMLPBIWFI}

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	2026-05-18T01:00:20.035178Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d48b554f1e40fcd696101218b785162a2485c3e033a51e8c001d889b096989e2

Aliases

arxiv: 1501.01818 · arxiv_version: 1501.01818v2 · doi: 10.48550/arxiv.1501.01818 · pith_short_12: 2SFVKTY6ID6N · pith_short_16: 2SFVKTY6ID6NNFQQ · pith_short_8: 2SFVKTY6

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/2SFVKTY6ID6NNFQQCIMLPBIWFI \
  | 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: d48b554f1e40fcd696101218b785162a2485c3e033a51e8c001d889b096989e2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3253f7102fec5fd3cd40b1e38af2231c3d3bb3cedaceef7370dfbbcec0498cb4",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-01-08T12:31:16Z",
    "title_canon_sha256": "bb7a133f0e0aa1d18985a3d1215568253330cf22a00d63c21855174618416828"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.01818",
    "kind": "arxiv",
    "version": 2
  }
}