Pith Number

pith:L2YYXLFC

pith:2018:L2YYXLFCWTCK54VV5IRBCQUNYX

not attested not anchored not stored refs pending

Nothing's plenty: The significance of null results in physics education research

Eric Kuo, Luke D. Conlin, Nicole R. Hallinen

arxiv:1810.10071 v1 · 2018-10-23 · 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{L2YYXLFCWTCK54VV5IRBCQUNYX}

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	2026-05-18T00:02:24.348765Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5eb18baca2b4c4aef2b5ea2211428dc5f76e9abbad4a547e78d8da9ae88dbb5d

Aliases

arxiv: 1810.10071 · arxiv_version: 1810.10071v1 · doi: 10.48550/arxiv.1810.10071 · pith_short_12: L2YYXLFCWTCK · pith_short_16: L2YYXLFCWTCK54VV · pith_short_8: L2YYXLFC

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/L2YYXLFCWTCK54VV5IRBCQUNYX \
  | 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: 5eb18baca2b4c4aef2b5ea2211428dc5f76e9abbad4a547e78d8da9ae88dbb5d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "61570515fab6131d5e1a3a3a64f1e8ad98d975a804d9d6bf0717e9779f5ede4e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2018-10-23T19:59:11Z",
    "title_canon_sha256": "1e0b0ba3561042c6402ffbb2e8316c33ffedb1495930d202f1b5862616ac76bf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.10071",
    "kind": "arxiv",
    "version": 1
  }
}