Pith Number

pith:V2KOCW62

pith:2018:V2KOCW62AVKTNHYJ65REQCYVPE

not attested not anchored not stored refs pending

A Note on a Picture-Hanging Puzzle

Radoslav Fulek, Sergey Avvakumov

arxiv:1812.06335 v2 · 2018-12-15 · math.CO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{V2KOCW62AVKTNHYJ65REQCYVPE}

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	2026-05-17T23:57:56.709733Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ae94e15bda0555369f09f762480b157907e4011fce70da287cd5933bfad55757

Aliases

arxiv: 1812.06335 · arxiv_version: 1812.06335v2 · doi: 10.48550/arxiv.1812.06335 · pith_short_12: V2KOCW62AVKT · pith_short_16: V2KOCW62AVKTNHYJ · pith_short_8: V2KOCW62

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/V2KOCW62AVKTNHYJ65REQCYVPE \
  | 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: ae94e15bda0555369f09f762480b157907e4011fce70da287cd5933bfad55757

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4cd697e13140699472f3e23f7fce55f69c7e4b52167421634f346fa778c56e79",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-12-15T18:53:32Z",
    "title_canon_sha256": "851525ae1861ac873dc94c5c8303122c1d24183b64ada0bc8acba260d1c002cd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.06335",
    "kind": "arxiv",
    "version": 2
  }
}