Pith Number

pith:2RHPYTIP

pith:2015:2RHPYTIPT3QXSVUGVUS5G4KYMK

not attested not anchored not stored refs pending

On the Erd\H{o}s-Hajnal conjecture for six-vertex tournaments

Eli Berger, Krzysztof Choromanski, Maria Chudnovsky

arxiv:1508.04992 v1 · 2015-08-20 · 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{2RHPYTIPT3QXSVUGVUS5G4KYMK}

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	2026-05-18T01:35:00.052158Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d44efc4d0f9ee1795686ad25d371586287287447d85c6986bf2871b4b335a4fb

Aliases

arxiv: 1508.04992 · arxiv_version: 1508.04992v1 · doi: 10.48550/arxiv.1508.04992 · pith_short_12: 2RHPYTIPT3QX · pith_short_16: 2RHPYTIPT3QXSVUG · pith_short_8: 2RHPYTIP

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/2RHPYTIPT3QXSVUGVUS5G4KYMK \
  | 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: d44efc4d0f9ee1795686ad25d371586287287447d85c6986bf2871b4b335a4fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c973efc624acd7e4b1f4c1dd7d3952dd886b09ef6f4a878edb902442051bd8d1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2015-08-20T14:12:26Z",
    "title_canon_sha256": "48a2c7f6f356f278bda671621c1bac0d9694a46c2c75fd3c1d57fd828cec7ed5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1508.04992",
    "kind": "arxiv",
    "version": 1
  }
}