Pith Number

pith:4QVNVS6Z

pith:2015:4QVNVS6ZWVVHSA6OVTWAWND6N2

not attested not anchored not stored refs pending

A New Item Response Theory Model for Open-Ended Online Homework with Multiple Allowed Attempts

Emre G\"on\"ulate\c{s}, Gerd Kortemeyer

arxiv:1503.06287 v1 · 2015-03-21 · physics.ed-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4QVNVS6ZWVVHSA6OVTWAWND6N2}

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	2026-05-18T02:20:38.803166Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e42adacbd9b56a7903ceacec0b347e6eaba8b0bfbae97fc27e91717c42f358b1

Aliases

arxiv: 1503.06287 · arxiv_version: 1503.06287v1 · doi: 10.48550/arxiv.1503.06287 · pith_short_12: 4QVNVS6ZWVVH · pith_short_16: 4QVNVS6ZWVVHSA6O · pith_short_8: 4QVNVS6Z

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/4QVNVS6ZWVVHSA6OVTWAWND6N2 \
  | 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: e42adacbd9b56a7903ceacec0b347e6eaba8b0bfbae97fc27e91717c42f358b1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "32f9f882993efa4870464e61808e58dcd459525fbf1b6b3852d1cee00c064ab0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2015-03-21T11:51:39Z",
    "title_canon_sha256": "9c3db7ab9b248c8fb766a4160e083fb494e9a479b9a0fe2d33fdc9eed8b521ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.06287",
    "kind": "arxiv",
    "version": 1
  }
}