Pith Number

pith:UIKN2IIJ

pith:2011:UIKN2IIJ7J7DWVMKSSOQMKJDVT

not attested not anchored not stored refs pending

A Proof of the Boyd-Carr Conjecture

Anke van Zuylen, David P. Williamson, Frans Schalekamp

arxiv:1107.1628 v1 · 2011-07-08 · cs.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{UIKN2IIJ7J7DWVMKSSOQMKJDVT}

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	2026-05-18T04:18:35.316812Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a214dd2109fa7e3b558a949d062923acc221080a444e6433102ce8cc44f75482

Aliases

arxiv: 1107.1628 · arxiv_version: 1107.1628v1 · doi: 10.48550/arxiv.1107.1628 · pith_short_12: UIKN2IIJ7J7D · pith_short_16: UIKN2IIJ7J7DWVMK · pith_short_8: UIKN2IIJ

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/UIKN2IIJ7J7DWVMKSSOQMKJDVT \
  | 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: a214dd2109fa7e3b558a949d062923acc221080a444e6433102ce8cc44f75482

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2186e4089d3a12dec9d05f6dc9fd5d63a0a4a06fd425dfcc09ec28fd95466a67",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-07-08T13:25:49Z",
    "title_canon_sha256": "b69231b053ed23cebed132b3e7f5a588d26904900ddb7de83103fcc341cccdf8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1107.1628",
    "kind": "arxiv",
    "version": 1
  }
}