Pith Number

pith:2DQM7VYJ

pith:2018:2DQM7VYJEQ4YUZOLSG6LR4WH6J

not attested not anchored not stored refs pending

Low-Cost Experiments with Everyday Objects for Homework Assignments

C. Dauphin, F. Bernard, F. Bouquet, J. Bobroff

arxiv:1807.03203 v2 · 2018-07-09 · 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{2DQM7VYJEQ4YUZOLSG6LR4WH6J}

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	2026-05-17T23:51:54.445579Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d0e0cfd70924398a65cb91bcb8f2c7f25cbc32dc807e586a3d2b3e4e3f1d72a9

Aliases

arxiv: 1807.03203 · arxiv_version: 1807.03203v2 · doi: 10.48550/arxiv.1807.03203 · pith_short_12: 2DQM7VYJEQ4Y · pith_short_16: 2DQM7VYJEQ4YUZOL · pith_short_8: 2DQM7VYJ

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/2DQM7VYJEQ4YUZOLSG6LR4WH6J \
  | 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: d0e0cfd70924398a65cb91bcb8f2c7f25cbc32dc807e586a3d2b3e4e3f1d72a9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b47f9fe049b1db1c85c37f319521b90252dba007a0b9fbe16a94b0f24d470caa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2018-07-09T14:53:45Z",
    "title_canon_sha256": "c279cf3a53ed1d01a409175d4e5b60a65cca8a443cf5e5ff95c5498a5815b15c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.03203",
    "kind": "arxiv",
    "version": 2
  }
}