Pith Number

pith:JGGGP2KD

pith:2019:JGGGP2KDIJW4Q326DUIG24GULW

not attested not anchored not stored refs pending

Rod in a train: a mechanical problem of H.Whitney, or Much Ado About Nothing

Alexander Shen

arxiv:1907.01598 v2 · 2019-07-02 · math.HO · math.DS

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JGGGP2KDIJW4Q326DUIG24GULW}

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	2026-05-17T23:41:16.965280Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

498c67e943426dc86f5e1d106d70d45d9c58fd31e8fe03d3a9a154db6d992a68

Aliases

arxiv: 1907.01598 · arxiv_version: 1907.01598v2 · doi: 10.48550/arxiv.1907.01598 · pith_short_12: JGGGP2KDIJW4 · pith_short_16: JGGGP2KDIJW4Q326 · pith_short_8: JGGGP2KD

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/JGGGP2KDIJW4Q326DUIG24GULW \
  | 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: 498c67e943426dc86f5e1d106d70d45d9c58fd31e8fe03d3a9a154db6d992a68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26a4f53eb675f953f6d6daa4a9a383c1b0467525ca10a9df6c296a0c14908ede",
    "cross_cats_sorted": [
      "math.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2019-07-02T19:41:12Z",
    "title_canon_sha256": "405407a93b14262077d569197c5610667e99e4f6058ceb20ba3e8f3b53c63eae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.01598",
    "kind": "arxiv",
    "version": 2
  }
}