Pith Number

pith:4T2BHFSR

pith:2013:4T2BHFSRANG6J7C27NS3PZXPAL

not attested not anchored not stored refs pending

Constructing a Multiple-Choice Assessment For Upper-Division Quantum Physics From An Open-Ended Tool

Daniel Rehn, Homeyra Sadaghiani, John Miller, Steven Pollock

arxiv:1308.4226 v1 · 2013-08-20 · 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{4T2BHFSRANG6J7C27NS3PZXPAL}

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	2026-05-18T03:15:33.377176Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4f4139651034de4fc5afb65b7e6ef02fe9f13f5cb1cfd348d5084d671fb1c95

Aliases

arxiv: 1308.4226 · arxiv_version: 1308.4226v1 · doi: 10.48550/arxiv.1308.4226 · pith_short_12: 4T2BHFSRANG6 · pith_short_16: 4T2BHFSRANG6J7C2 · pith_short_8: 4T2BHFSR

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/4T2BHFSRANG6J7C27NS3PZXPAL \
  | 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: e4f4139651034de4fc5afb65b7e6ef02fe9f13f5cb1cfd348d5084d671fb1c95

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f390d88a7e313551dcaf7eb4d4c07b47a42907f61bdc94520912e011f6f723dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2013-08-20T04:34:45Z",
    "title_canon_sha256": "fa99869895634c1ba6ef9a2d10c42a12b83be34119eb5e397f05914c01cd5f78"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.4226",
    "kind": "arxiv",
    "version": 1
  }
}