Pith Number

pith:5HAHCF2P

pith:2016:5HAHCF2P5KTM5XKHWIRKQACIE7

not attested not anchored not stored refs pending

On Horizontal and Vertical Separation in Hierarchical Text Classification

Hosein Azarbonyad, Jaap Kamps, Maarten Marx, Mostafa Dehghani

arxiv:1609.00514 v1 · 2016-09-02 · cs.IR · cs.CL · cs.IT · math.IT

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

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	2026-05-18T01:06:23.781020Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e9c071174feaa6cedd47b222a8004827eeb4dabf9a58cb273ee746ef925e172d

Aliases

arxiv: 1609.00514 · arxiv_version: 1609.00514v1 · doi: 10.48550/arxiv.1609.00514 · pith_short_12: 5HAHCF2P5KTM · pith_short_16: 5HAHCF2P5KTM5XKH · pith_short_8: 5HAHCF2P

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/5HAHCF2P5KTM5XKHWIRKQACIE7 \
  | 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: e9c071174feaa6cedd47b222a8004827eeb4dabf9a58cb273ee746ef925e172d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f0c8aa29e3b6ef007d991c8914fd8a50f1eeaab5def3fb6cb993c8aab5dc6ce",
    "cross_cats_sorted": [
      "cs.CL",
      "cs.IT",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2016-09-02T09:21:33Z",
    "title_canon_sha256": "3e690acc607675f7e7f1b6e180a1731b36b2525889bc73f2e002cbe5849eea08"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1609.00514",
    "kind": "arxiv",
    "version": 1
  }
}