Pith Number

pith:QDQ2JVED

pith:2017:QDQ2JVEDFBKF7HTSYPFM5EQKOY

not attested not anchored not stored refs pending

Parking cars after a trailer

Alex Happ, Richard Ehrenborg

arxiv:1709.01466 v1 · 2017-09-05 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QDQ2JVEDFBKF7HTSYPFM5EQKOY}

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	2026-05-18T00:36:00.016597Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80e1a4d48328545f9e72c3cace920a7630368717e9e7169af0dbd128a0b41f92

Aliases

arxiv: 1709.01466 · arxiv_version: 1709.01466v1 · doi: 10.48550/arxiv.1709.01466 · pith_short_12: QDQ2JVEDFBKF · pith_short_16: QDQ2JVEDFBKF7HTS · pith_short_8: QDQ2JVED

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/QDQ2JVEDFBKF7HTSYPFM5EQKOY \
  | 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: 80e1a4d48328545f9e72c3cace920a7630368717e9e7169af0dbd128a0b41f92

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5922dc671ba13efd80b39f87659d064f287d3b6140ef8887e3c7e5c6cf4a7b3e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-09-05T15:55:52Z",
    "title_canon_sha256": "2b080ed48f2d5fb6694a3116b4d668eb4db0caacd2399a324a983be6c2c41e32"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1709.01466",
    "kind": "arxiv",
    "version": 1
  }
}