Pith Number

pith:QDAJQM3M

pith:2013:QDAJQM3MBIVGPONNX2UPK5GCDI

not attested not anchored not stored refs pending

Gender gap on concept inventories in physics: what is consistent, what is inconsistent, and what factors influence the gap?

Adrian Madsen, Eleanor C. Sayre, Sarah B. McKagan

arxiv:1307.0912 v3 · 2013-07-03 · 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{QDAJQM3MBIVGPONNX2UPK5GCDI}

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	2026-05-18T02:55:36.321653Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80c098336c0a2a67b9adbea8f574c21a1bcf6e24cdf4e4ae7e82805d3f88a127

Aliases

arxiv: 1307.0912 · arxiv_version: 1307.0912v3 · doi: 10.48550/arxiv.1307.0912 · pith_short_12: QDAJQM3MBIVG · pith_short_16: QDAJQM3MBIVGPONN · pith_short_8: QDAJQM3M

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/QDAJQM3MBIVGPONNX2UPK5GCDI \
  | 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: 80c098336c0a2a67b9adbea8f574c21a1bcf6e24cdf4e4ae7e82805d3f88a127

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d568a63051d57e95a262a80b4a03c7103f6aa61bbb6d0c8291d787d02fc08728",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2013-07-03T04:18:23Z",
    "title_canon_sha256": "74a5bc7efb2073dbdeeab84b2296a828c8a23dcc0a810c1dea1daa87da01df89"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.0912",
    "kind": "arxiv",
    "version": 3
  }
}