Pith Number

pith:SPPD4FA4

pith:2019:SPPD4FA4SSBLC4VFCA4MUV27O3

not attested not anchored not stored refs pending

Improving a tf-idf weighted document vector embedding

Craig W. Schmidt

arxiv:1902.09875 v1 · 2019-02-26 · 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{SPPD4FA4SSBLC4VFCA4MUV27O3}

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	2026-05-17T23:52:35.114904Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93de3e141c9482b172a51038ca575f76d3c031fc1082c5e87eb6ad5aab7c4528

Aliases

arxiv: 1902.09875 · arxiv_version: 1902.09875v1 · doi: 10.48550/arxiv.1902.09875 · pith_short_12: SPPD4FA4SSBL · pith_short_16: SPPD4FA4SSBLC4VF · pith_short_8: SPPD4FA4

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/SPPD4FA4SSBLC4VFCA4MUV27O3 \
  | 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: 93de3e141c9482b172a51038ca575f76d3c031fc1082c5e87eb6ad5aab7c4528

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2f112795846c3b51d81017a7731ec64b8f8d37ebcb93b7c52b96f3138ec2f4c9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2019-02-26T11:55:35Z",
    "title_canon_sha256": "7608ca4d59f889342cced818063a9676dc4b48bb2a8cb13f3c9371ae22f1b2cf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.09875",
    "kind": "arxiv",
    "version": 1
  }
}