Pith Number

pith:ODLMZD6G

pith:2018:ODLMZD6GZPITU4EQ6OIXNQCBWW

not attested not anchored not stored refs pending

Kappa Learning: A New Method for Measuring Similarity Between Educational Items Using Performance Data

Giora Alexandron, Sara Hershkovitz, Tanya Nazaretsky

arxiv:1812.08390 v1 · 2018-12-20 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ODLMZD6GZPITU4EQ6OIXNQCBWW}

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	2026-05-17T23:57:51.395984Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

70d6cc8fc6cbd13a7090f39176c041b59c51c256f552b9ee0ee36f65fc6898e2

Aliases

arxiv: 1812.08390 · arxiv_version: 1812.08390v1 · doi: 10.48550/arxiv.1812.08390 · pith_short_12: ODLMZD6GZPIT · pith_short_16: ODLMZD6GZPITU4EQ · pith_short_8: ODLMZD6G

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/ODLMZD6GZPITU4EQ6OIXNQCBWW \
  | 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: 70d6cc8fc6cbd13a7090f39176c041b59c51c256f552b9ee0ee36f65fc6898e2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1564758d27c88d121a5cb37088841e0ee1e7e534b6226778a0327c0150558331",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2018-12-20T07:12:45Z",
    "title_canon_sha256": "513bb10355fb70865c0c02dbb7460a1259c5b2e2a116be94525dad5e314f858e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.08390",
    "kind": "arxiv",
    "version": 1
  }
}