Pith Number

pith:7EDXLBQI

pith:2002:7EDXLBQI6AT7GZOW3WLT7VRSNE

not attested not anchored not stored refs pending

Inference of entropies of discrete random variables with unknown cardinalities

Ilya Nemenman

arxiv:physics/0207009 v1 · 2002-07-02 · 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{7EDXLBQI6AT7GZOW3WLT7VRSNE}

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	2026-05-18T03:00:15.086465Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f907758608f027f365d6dd973fd6326919f382130bb156acb1b6d45ef2242d41

Aliases

arxiv: physics/0207009 · arxiv_version: physics/0207009v1 · doi: 10.48550/arxiv.physics/0207009 · pith_short_12: 7EDXLBQI6AT7 · pith_short_16: 7EDXLBQI6AT7GZOW · pith_short_8: 7EDXLBQI

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/7EDXLBQI6AT7GZOW3WLT7VRSNE \
  | 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: f907758608f027f365d6dd973fd6326919f382130bb156acb1b6d45ef2242d41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d17a104b5bfeb19b9ef0ebee9ed376bce7301f78c6b2c892979ce50342c89381",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.data-an",
    "submitted_at": "2002-07-02T03:15:15Z",
    "title_canon_sha256": "e7541ce318205e5b88cb60dea7c003051d4de6e5a075abc3d68a4d9a6765dfa0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0207009",
    "kind": "arxiv",
    "version": 1
  }
}