Pith Number

pith:4FC7XHJH

pith:2011:4FC7XHJH5SUNAD65MFEAYMJNE5

not attested not anchored not stored refs pending

Information-Theoretic Measures for Objective Evaluation of Classifications

Bao-Gang Hu, Ran He, Xiaotong Yuan

arxiv:1107.1837 v1 · 2011-07-10 · cs.CV · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4FC7XHJH5SUNAD65MFEAYMJNE5}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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	2026-05-18T03:48:46.568834Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e145fb9d27eca8d00fdd61480c312d277ef31a8364c51e625a87e128cc35b03d

Aliases

arxiv: 1107.1837 · arxiv_version: 1107.1837v1 · doi: 10.48550/arxiv.1107.1837 · pith_short_12: 4FC7XHJH5SUN · pith_short_16: 4FC7XHJH5SUNAD65 · pith_short_8: 4FC7XHJH

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/4FC7XHJH5SUNAD65MFEAYMJNE5 \
  | 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: e145fb9d27eca8d00fdd61480c312d277ef31a8364c51e625a87e128cc35b03d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f7dec34851b89bcc30c74386795304317e3d335416c4abdda167356fc82d0fb9",
    "cross_cats_sorted": [
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2011-07-10T05:43:09Z",
    "title_canon_sha256": "324d31cd7d086b8d87375093a8345c9e1c939d8681b57a11aeb177eacd725d62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.1837",
    "kind": "arxiv",
    "version": 1
  }
}