Pith Number

pith:ITL7TZX6

pith:2009:ITL7TZX6ADAHI3RU7SXLNIRKX5

not attested not anchored not stored refs pending

A Tale of Two Curricula: The performance of two thousand students in introductory electromagnetism

Bruce A. Sherwood, Lin Ding, Marcos D. Caballero, Mark P. Haugan, Matthew A. Kohlmyer, Michael F. Schatz, M. Jackson Marr, Richard Catrambone, Ruth W. Chabay

arxiv:0906.0022 v1 · 2009-05-29 · 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{ITL7TZX6ADAHI3RU7SXLNIRKX5}

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	2026-05-18T02:13:30.514779Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

44d7f9e6fe00c0746e34fcaeb6a22abf53f14ff7bc14ae77f503dd36124ffb13

Aliases

arxiv: 0906.0022 · arxiv_version: 0906.0022v1 · doi: 10.48550/arxiv.0906.0022 · pith_short_12: ITL7TZX6ADAH · pith_short_16: ITL7TZX6ADAHI3RU · pith_short_8: ITL7TZX6

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/ITL7TZX6ADAHI3RU7SXLNIRKX5 \
  | 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: 44d7f9e6fe00c0746e34fcaeb6a22abf53f14ff7bc14ae77f503dd36124ffb13

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ac0bc0145aee7b41be3f2fc9a0d0e6cb66a89255b12cb51da9309c119f9bce3d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2009-05-29T21:11:48Z",
    "title_canon_sha256": "832c46251bcf0047b665f695f161d9b73d21e7571b7c9e597f7622261eff30f0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.0022",
    "kind": "arxiv",
    "version": 1
  }
}