Pith Number

pith:RNTCYQBT

pith:2014:RNTCYQBTCVUNCD5MWKJJKDDGX4

not attested not anchored not stored refs pending

Havannah and TwixT are PSPACE-complete

Abdallah Saffidine, Edouard Bonnet, Florian Jamain

arxiv:1403.6518 v1 · 2014-03-25 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RNTCYQBTCVUNCD5MWKJJKDDGX4}

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.

Cited by

1 paper in Pith

Quoridor is PSPACE-Complete

Receipt and verification

First computed	2026-05-18T02:55:29.752779Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8b662c40331568d10facb292950c66bf2ef685ba2ddfd46a8f963ee2bd4a1511

Aliases

arxiv: 1403.6518 · arxiv_version: 1403.6518v1 · doi: 10.48550/arxiv.1403.6518 · pith_short_12: RNTCYQBTCVUN · pith_short_16: RNTCYQBTCVUNCD5M · pith_short_8: RNTCYQBT

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/RNTCYQBTCVUNCD5MWKJJKDDGX4 \
  | 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: 8b662c40331568d10facb292950c66bf2ef685ba2ddfd46a8f963ee2bd4a1511

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c01bcc2c4638746667a43586f3abbfe94de99d923c25a9c86ed83a9190c06ef8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2014-03-25T21:55:25Z",
    "title_canon_sha256": "904c16384ced621fa68eb87c08fd2c2bf5922a228ebe534117dd5b1ff6b1bec1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.6518",
    "kind": "arxiv",
    "version": 1
  }
}