Pith Number

pith:7WCF2U5W

pith:2019:7WCF2U5WHHGG7HTY4LPXSSIQKJ

not attested not anchored not stored refs pending

Packing Disks into Disks with Optimal Worst-Case Density

Christian Scheffer, Phillip Keldenich, S\'andor P. Fekete

arxiv:1903.07908 v1 · 2019-03-19 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7WCF2U5WHHGG7HTY4LPXSSIQKJ}

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	2026-05-17T23:50:53.506732Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd845d53b639cc6f9e78e2df794910525395d30a9f874111ef43626964c7c7c6

Aliases

arxiv: 1903.07908 · arxiv_version: 1903.07908v1 · doi: 10.48550/arxiv.1903.07908 · pith_short_12: 7WCF2U5WHHGG · pith_short_16: 7WCF2U5WHHGG7HTY · pith_short_8: 7WCF2U5W

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/7WCF2U5WHHGG7HTY4LPXSSIQKJ \
  | 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: fd845d53b639cc6f9e78e2df794910525395d30a9f874111ef43626964c7c7c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8c50b800b2c4decbce39be15da9a00fc9b8f4145e7779c891298b240fbdcf24",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2019-03-19T09:59:06Z",
    "title_canon_sha256": "0f00aa21a592d2ba040e92c1ad325f16418189e91fd054955fc45af47f1e546a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.07908",
    "kind": "arxiv",
    "version": 1
  }
}