Pith Number

pith:C6WCOH7K

pith:2021:C6WCOH7KXYHE4VRLNUOAFJPUKV

not attested not anchored not stored refs pending

CoPHE: A Count-Preserving Hierarchical Evaluation Metric in Large-Scale Multi-Label Text Classification

Alexandra Birch, Beatrice Alex, Hang Dong, Mat\'u\v{s} Falis

arxiv:2109.04853 v1 · 2021-09-10 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{C6WCOH7KXYHE4VRLNUOAFJPUKV}

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	2026-07-05T03:13:10.803066Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

17ac271feabe0e4e562b6d1c02a5f455470d8797c722282ea389ccce86867693

Aliases

arxiv: 2109.04853 · arxiv_version: 2109.04853v1 · doi: 10.48550/arxiv.2109.04853 · pith_short_12: C6WCOH7KXYHE · pith_short_16: C6WCOH7KXYHE4VRL · pith_short_8: C6WCOH7K

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/C6WCOH7KXYHE4VRLNUOAFJPUKV \
  | 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: 17ac271feabe0e4e562b6d1c02a5f455470d8797c722282ea389ccce86867693

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78ac9f7daca3c5d6a44f171e23be44f32cac06587b0bca11aa8886800e3ff497",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-09-10T13:09:12Z",
    "title_canon_sha256": "979afa51e8e2ce7822ae59cb3c8d790b766a52fa943d3f0ed725dc860f25687b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.04853",
    "kind": "arxiv",
    "version": 1
  }
}