Pith Number

pith:XRSDHYG2

pith:2011:XRSDHYG25SOU4IDJPDSL4M4V3U

not attested not anchored not stored refs pending

On the van der Waerden numbers w(2;3,t)

Hunter Snevily, Oliver Kullmann, Tanbir Ahmed

arxiv:1102.5433 v4 · 2011-02-26 · math.CO · 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{XRSDHYG25SOU4IDJPDSL4M4V3U}

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	2026-05-18T01:41:00.387284Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc6433e0daec9d4e206978e4be3395dd093d593f9674349727e2149c1db33db1

Aliases

arxiv: 1102.5433 · arxiv_version: 1102.5433v4 · doi: 10.48550/arxiv.1102.5433 · pith_short_12: XRSDHYG25SOU · pith_short_16: XRSDHYG25SOU4IDJ · pith_short_8: XRSDHYG2

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/XRSDHYG25SOU4IDJPDSL4M4V3U \
  | 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: bc6433e0daec9d4e206978e4be3395dd093d593f9674349727e2149c1db33db1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9515dd0f4001086a77cf2748e18a5c09e1920b809732a740469025794f1763d5",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2011-02-26T18:30:11Z",
    "title_canon_sha256": "f2fc918eedb775993dac554cf755ca76fb9d1199e955b48fb85ec8ff82402677"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.5433",
    "kind": "arxiv",
    "version": 4
  }
}