Pith Number

pith:ZRZO2ZGF

pith:2013:ZRZO2ZGFGW3642ADIBFQT72IAG

not attested not anchored not stored refs pending

Assessing Student Learning in Middle-Division Classical Mechanics/Math Methods

Marcos D. Caballero, Steven J. Pollock

arxiv:1306.2905 v1 · 2013-06-12 · 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{ZRZO2ZGFGW3642ADIBFQT72IAG}

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	2026-05-18T03:21:09.049989Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc72ed64c535b7ee6803404b09ff48019b1308992b50d0dc40e99718765df458

Aliases

arxiv: 1306.2905 · arxiv_version: 1306.2905v1 · doi: 10.48550/arxiv.1306.2905 · pith_short_12: ZRZO2ZGFGW36 · pith_short_16: ZRZO2ZGFGW3642AD · pith_short_8: ZRZO2ZGF

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/ZRZO2ZGFGW3642ADIBFQT72IAG \
  | 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: cc72ed64c535b7ee6803404b09ff48019b1308992b50d0dc40e99718765df458

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "356387315e1346d0eb0ccc397069c4d0452d152e0685a42fd4a822a3dfe1575f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2013-06-12T17:28:47Z",
    "title_canon_sha256": "10850a89b4406b16e42f146977417aa6335bd45937d2d90c940a7c71a815a6d1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.2905",
    "kind": "arxiv",
    "version": 1
  }
}