Pith Number

pith:FVHIKA3I

pith:2017:FVHIKA3IEV3A4RSQCRYLAFSJJK

not attested not anchored not stored refs pending

The Trees of Hanoi

Joost Engelfriet

arxiv:1710.04551 v1 · 2017-10-12 · cs.FL · cs.DS · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FVHIKA3IEV3A4RSQCRYLAFSJJK}

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	2026-05-18T00:33:00.699077Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2d4e85036825760e46501470b016494a8d2a1748262f21e7a8ef9b14defcbe8b

Aliases

arxiv: 1710.04551 · arxiv_version: 1710.04551v1 · doi: 10.48550/arxiv.1710.04551 · pith_short_12: FVHIKA3IEV3A · pith_short_16: FVHIKA3IEV3A4RSQ · pith_short_8: FVHIKA3I

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/FVHIKA3IEV3A4RSQCRYLAFSJJK \
  | 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: 2d4e85036825760e46501470b016494a8d2a1748262f21e7a8ef9b14defcbe8b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dbd82a4f788e2f8b2d7b46c016d9dc8dde222535775d8ad88e0b7c645f92ad1b",
    "cross_cats_sorted": [
      "cs.DS",
      "math.HO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2017-10-12T14:56:56Z",
    "title_canon_sha256": "b17c2cbd22b91a03d57f1d0f66bfd49def1f75ef6bc2064a84f24b2146562138"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.04551",
    "kind": "arxiv",
    "version": 1
  }
}