Pith Number

pith:EEAW2DWF

pith:2018:EEAW2DWFNDHWTHT7MEG2LBUSAT

not attested not anchored not stored refs pending

The Hadwiger-Nelson problem with two forbidden distances

Dan Ismailescu, Geoffrey Exoo

arxiv:1805.06055 v1 · 2018-05-15 · 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{EEAW2DWFNDHWTHT7MEG2LBUSAT}

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	2026-05-18T00:15:49.027742Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21016d0ec568cf699e7f610da5869204e7cd1c689e3292bf3baf0897d5e6f41b

Aliases

arxiv: 1805.06055 · arxiv_version: 1805.06055v1 · doi: 10.48550/arxiv.1805.06055 · pith_short_12: EEAW2DWFNDHW · pith_short_16: EEAW2DWFNDHWTHT7 · pith_short_8: EEAW2DWF

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/EEAW2DWFNDHWTHT7MEG2LBUSAT \
  | 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: 21016d0ec568cf699e7f610da5869204e7cd1c689e3292bf3baf0897d5e6f41b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44d7d4c9f41aa5a3b6a1f7c244db938195944a707f7803b8cc816748d4ba7008",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-05-15T22:32:23Z",
    "title_canon_sha256": "03c3c972932bf10564a538a7abb7a4b7b490c25fa6261fb982ddc9096135be82"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1805.06055",
    "kind": "arxiv",
    "version": 1
  }
}