Pith Number

pith:NKNDHZI7

pith:2015:NKNDHZI74MMMUUT42V5BQX6ETZ

not attested not anchored not stored refs pending

Modernizing the SI: implications of recent progress with the fundamental constants

Martin JT Milton, Michael Stock, Nick Fletcher, Richard S Davis

arxiv:1510.08324 v1 · 2015-10-27 · physics.ins-det

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NKNDHZI74MMMUUT42V5BQX6ETZ}

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	2026-05-18T01:28:36.401782Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a9a33e51fe318ca527cd57a185fc49e607769653b627457e6b68641553d49c6

Aliases

arxiv: 1510.08324 · arxiv_version: 1510.08324v1 · doi: 10.48550/arxiv.1510.08324 · pith_short_12: NKNDHZI74MMM · pith_short_16: NKNDHZI74MMMUUT4 · pith_short_8: NKNDHZI7

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/NKNDHZI74MMMUUT42V5BQX6ETZ \
  | 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: 6a9a33e51fe318ca527cd57a185fc49e607769653b627457e6b68641553d49c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bb5a3dce437ffc7bdb614a2b438372e4daf0192fe8a21ecb2c0ecb7b2e5159c0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ins-det",
    "submitted_at": "2015-10-27T17:09:25Z",
    "title_canon_sha256": "491c197604742527394c9a6abf812fa5fde2c00ea11c3fcddef569eeee88a0ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.08324",
    "kind": "arxiv",
    "version": 1
  }
}