Pith Number

pith:CVP5RHW4

pith:2019:CVP5RHW4U36WAKB5RT5ENKYO62

not attested not anchored not stored refs pending

No Permanent Friends or Enemies: Tracking Relationships between Nations from News

Chenhao Tan, Eunsol Choi, Xiaochuang Han

arxiv:1904.08950 v1 · 2019-04-18 · cs.CL · cs.AI · cs.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CVP5RHW4U36WAKB5RT5ENKYO62}

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	2026-05-17T23:48:08.832007Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

155fd89edca6fd60283d8cfa46ab0ef6a40df8acee04d5d1fb6f9188323c1356

Aliases

arxiv: 1904.08950 · arxiv_version: 1904.08950v1 · doi: 10.48550/arxiv.1904.08950 · pith_short_12: CVP5RHW4U36W · pith_short_16: CVP5RHW4U36WAKB5 · pith_short_8: CVP5RHW4

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/CVP5RHW4U36WAKB5RT5ENKYO62 \
  | 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: 155fd89edca6fd60283d8cfa46ab0ef6a40df8acee04d5d1fb6f9188323c1356

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "969d18c40fc5792598787e3dc5421ee5a9f2f1a17a3a31e39da4874cb6760dc7",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2019-04-18T18:00:30Z",
    "title_canon_sha256": "4372879c2805e28912c350f4a38d9f6149e7cd6986e1e0c36ba9dd96fbf7c0e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.08950",
    "kind": "arxiv",
    "version": 1
  }
}