Pith Number

pith:ERWFYVKB

pith:2018:ERWFYVKBXBSJDQ2JDWQPK7NBMR

not attested not anchored not stored refs pending

Multi-Dimensional Item Response Theory and the Force Concept Inventory

Cabot Zabriskie, Gay Stewart, John Stewart, Seth DeVore

arxiv:1803.02399 v1 · 2018-03-06 · 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{ERWFYVKBXBSJDQ2JDWQPK7NBMR}

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	2026-05-18T00:12:52.916053Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

246c5c5541b86491c3491da0f57da164622aaeaa741204a4cd36d71296595891

Aliases

arxiv: 1803.02399 · arxiv_version: 1803.02399v1 · doi: 10.48550/arxiv.1803.02399 · pith_short_12: ERWFYVKBXBSJ · pith_short_16: ERWFYVKBXBSJDQ2J · pith_short_8: ERWFYVKB

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/ERWFYVKBXBSJDQ2JDWQPK7NBMR \
  | 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: 246c5c5541b86491c3491da0f57da164622aaeaa741204a4cd36d71296595891

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e685192d1f461dae1329e895916e1b28ae7c5fa8d162363436b7d82f7dac5b93",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2018-03-06T19:41:23Z",
    "title_canon_sha256": "2185f4cafecd5ab0821ca8d0191f2d970632c75e6a7f43a0d2d55326828bf3bd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.02399",
    "kind": "arxiv",
    "version": 1
  }
}