Pith Number

pith:5OIAFVMT

pith:2015:5OIAFVMT4Q6VYXWU62WMJOR7T5

not attested not anchored not stored refs pending

SPRITE: A Response Model For Multiple Choice Testing

Andrew E. Waters, Christoph Studer, Richard G. Baraniuk, Ryan Ning

arxiv:1501.02844 v1 · 2015-01-12 · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5OIAFVMT4Q6VYXWU62WMJOR7T5}

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	2026-05-18T02:29:31.104131Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eb9002d593e43d5c5ed4f6acc4ba3f9f55b7ef14ac2481c30239da804df7847f

Aliases

arxiv: 1501.02844 · arxiv_version: 1501.02844v1 · doi: 10.48550/arxiv.1501.02844 · pith_short_12: 5OIAFVMT4Q6V · pith_short_16: 5OIAFVMT4Q6VYXWU · pith_short_8: 5OIAFVMT

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/5OIAFVMT4Q6VYXWU62WMJOR7T5 \
  | 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: eb9002d593e43d5c5ed4f6acc4ba3f9f55b7ef14ac2481c30239da804df7847f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5257a643ac2ce86a510142f12074ad1ec2d439a7f342f74053912281222fca2e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2015-01-12T22:51:08Z",
    "title_canon_sha256": "669f828eb761a4fb001d28bccb42571ad14006d184b2c82a3506c888ade41117"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.02844",
    "kind": "arxiv",
    "version": 1
  }
}