Pith Number

pith:NTGGV5Y7

pith:2018:NTGGV5Y7DYUVHK5YJFXELUEKCJ

not attested not anchored not stored refs pending

Fast Entropy Estimation for Natural Sequences

Andrew D. Back, Daniel Angus, Janet Wiles

arxiv:1805.06630 v1 · 2018-05-17 · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NTGGV5Y7DYUVHK5YJFXELUEKCJ}

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	2026-05-18T00:15:43.857974Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ccc6af71f1e2953abb8496e45d08a127a13c3ceb0ab4b998713fbbe35ab354a

Aliases

arxiv: 1805.06630 · arxiv_version: 1805.06630v1 · doi: 10.48550/arxiv.1805.06630 · pith_short_12: NTGGV5Y7DYUV · pith_short_16: NTGGV5Y7DYUVHK5Y · pith_short_8: NTGGV5Y7

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/NTGGV5Y7DYUVHK5YJFXELUEKCJ \
  | 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: 6ccc6af71f1e2953abb8496e45d08a127a13c3ceb0ab4b998713fbbe35ab354a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fa5e8093720c48220e8c18153ea88fe6edd6812e1242a8273e8aa20bc01855bf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.data-an",
    "submitted_at": "2018-05-17T07:26:03Z",
    "title_canon_sha256": "d6c63af01490819198da9db16d24b2cfa69dbeaab6fb306024711e8fd7a1c44d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.06630",
    "kind": "arxiv",
    "version": 1
  }
}