Pith Number

pith:NFZYWM3B

pith:2008:NFZYWM3B4E7NRZEDQHC6UNLFMH

not attested not anchored not stored refs pending

The colorful Helly theorem and colorful resolutions of ideals

Gunnar Floystad

arxiv:0809.3366 v2 · 2008-09-19 · math.AC · 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{NFZYWM3B4E7NRZEDQHC6UNLFMH}

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	2026-05-18T01:03:41.321842Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69738b3361e13ed8e48381c5ea356561fd85e7d3a8f889921a2b34d70f170079

Aliases

arxiv: 0809.3366 · arxiv_version: 0809.3366v2 · doi: 10.48550/arxiv.0809.3366 · pith_short_12: NFZYWM3B4E7N · pith_short_16: NFZYWM3B4E7NRZED · pith_short_8: NFZYWM3B

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/NFZYWM3B4E7NRZEDQHC6UNLFMH \
  | 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: 69738b3361e13ed8e48381c5ea356561fd85e7d3a8f889921a2b34d70f170079

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39f2dc3a9662face7ad2501087a9d09073a3a50a3d5e79f58e9e981779fd00d1",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AC",
    "submitted_at": "2008-09-19T12:46:47Z",
    "title_canon_sha256": "1a11f21639db8f73a198e469ed8cb4cb91aaff0f1c89584cc0038b1c7739c230"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.3366",
    "kind": "arxiv",
    "version": 2
  }
}