Pith Number

pith:ZJOKGUFN

pith:2002:ZJOKGUFNPXIIGFOKKJUBYU5OBQ

not attested not anchored not stored refs pending

Model Analysis: Assessing the dynamics of student learning

Edward F. Redish, Lei Bao

arxiv:physics/0207069 v1 · 2002-07-17 · 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{ZJOKGUFNPXIIGFOKKJUBYU5OBQ}

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	2026-05-18T03:46:17.213022Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ca5ca350ad7dd08315ca52681c53ae0c31c466c14dfc75bf18d8f754e702c48f

Aliases

arxiv: physics/0207069 · arxiv_version: physics/0207069v1 · doi: 10.48550/arxiv.physics/0207069 · pith_short_12: ZJOKGUFNPXII · pith_short_16: ZJOKGUFNPXIIGFOK · pith_short_8: ZJOKGUFN

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/ZJOKGUFNPXIIGFOKKJUBYU5OBQ \
  | 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: ca5ca350ad7dd08315ca52681c53ae0c31c466c14dfc75bf18d8f754e702c48f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ca59770bfb7688490b55147eb1cf5bf0c4c3dd7d425959df6bb7483d327f5ebb",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2002-07-17T21:35:25Z",
    "title_canon_sha256": "c46ef6e5aee66147f5e760b24a3eefb2aa1a0f91a62816090b769e69e3707041"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0207069",
    "kind": "arxiv",
    "version": 1
  }
}