Pith Number

pith:OHJJUGTR

pith:2009:OHJJUGTRMH6JIOR5KCA7PZZ62V

not attested not anchored not stored refs pending

The Curling Number Conjecture

Benjamin Chaffin, N. J. A. Sloane

arxiv:0912.2382 v5 · 2009-12-12 · 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{OHJJUGTRMH6JIOR5KCA7PZZ62V}

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	2026-05-18T03:33:26.936177Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

71d29a1a7161fc943a3d5081f7e73ed568b46d33984b401d8c8835dd5e6143c6

Aliases

arxiv: 0912.2382 · arxiv_version: 0912.2382v5 · doi: 10.48550/arxiv.0912.2382 · pith_short_12: OHJJUGTRMH6J · pith_short_16: OHJJUGTRMH6JIOR5 · pith_short_8: OHJJUGTR

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/OHJJUGTRMH6JIOR5KCA7PZZ62V \
  | 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: 71d29a1a7161fc943a3d5081f7e73ed568b46d33984b401d8c8835dd5e6143c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8a2a84778b7215a70ff4c1da51eafaa402600227a68108f2dbe6e993eba95893",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2009-12-12T00:30:44Z",
    "title_canon_sha256": "37bfbf3c5f2df749345dfb994612c320cf6d212e31de21474f61a919b7e6438b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.2382",
    "kind": "arxiv",
    "version": 5
  }
}