Pith Number

pith:CZL2WFIK

pith:2017:CZL2WFIKKKIZTYZRVAWV34MTPJ

not attested not anchored not stored refs pending

The effectiveness of 'pencasts' in physics courses

Dean A Zollman, Eleanor C Sayre, Nandana Weliweriya

arxiv:1703.09349 v1 · 2017-03-27 · 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{CZL2WFIKKKIZTYZRVAWV34MTPJ}

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	2026-05-18T00:21:14.485490Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1657ab150a529199e331a82d5df1937a602b54ba0dcd9cde5c2c709d40148a12

Aliases

arxiv: 1703.09349 · arxiv_version: 1703.09349v1 · doi: 10.48550/arxiv.1703.09349 · pith_short_12: CZL2WFIKKKIZ · pith_short_16: CZL2WFIKKKIZTYZR · pith_short_8: CZL2WFIK

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/CZL2WFIKKKIZTYZRVAWV34MTPJ \
  | 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: 1657ab150a529199e331a82d5df1937a602b54ba0dcd9cde5c2c709d40148a12

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d770b14d8876c5dddc6c1c359a2f6758d3f5bad27bf7ccc17ca9115c337165c2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2017-03-27T23:44:59Z",
    "title_canon_sha256": "3fc4891a72ea74b8feb45c6becf621a8f79863834d900aa46fa371e9f1609f8e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.09349",
    "kind": "arxiv",
    "version": 1
  }
}