Pith Number

pith:P6AYJFJN

pith:2019:P6AYJFJNFRTB7NHFH4NUKGSVJT

not attested not anchored not stored refs pending

Direct detection of the cosmic expansion: the redshift drift and the flux drift

Chengyi Wang, Geraint F. Lewis, Krzysztof Bolejko

arxiv:1907.04495 v1 · 2019-07-10 · 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{P6AYJFJNFRTB7NHFH4NUKGSVJT}

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	2026-05-17T23:41:00.083946Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f8184952d2c661fb4e53f1b451a554cc8c31133ead52e0d7c0a042ca89777dc

Aliases

arxiv: 1907.04495 · arxiv_version: 1907.04495v1 · doi: 10.48550/arxiv.1907.04495 · pith_short_12: P6AYJFJNFRTB · pith_short_16: P6AYJFJNFRTB7NHF · pith_short_8: P6AYJFJN

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/P6AYJFJNFRTB7NHFH4NUKGSVJT \
  | 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: 7f8184952d2c661fb4e53f1b451a554cc8c31133ead52e0d7c0a042ca89777dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "785397185a96f7c24c30921c6d5992144875506684894e2fb9d00ca9352b423c",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2019-07-10T02:51:15Z",
    "title_canon_sha256": "e47e367dd83b2662ce1755c34501195fb1433ec68b8fd1a85337d368cf37d845"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.04495",
    "kind": "arxiv",
    "version": 1
  }
}