Pith Number

pith:2Y655P67

pith:2013:2Y655P67SR7K3A5S5ZJO2S245J

not attested not anchored not stored refs pending

Colouring quadrangulations of projective spaces

Mat\v{e}j Stehl\'ik, Tom\'a\v{s} Kaiser

arxiv:1310.5875 v2 · 2013-10-22 · 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{2Y655P67SR7K3A5S5ZJO2S245J}

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	2026-05-18T02:16:51.438184Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d63ddebfdf947ead83b2ee52ed4b5cea4a542c7d8c263739e18ea6dedbbdb87b

Aliases

arxiv: 1310.5875 · arxiv_version: 1310.5875v2 · doi: 10.48550/arxiv.1310.5875 · pith_short_12: 2Y655P67SR7K · pith_short_16: 2Y655P67SR7K3A5S · pith_short_8: 2Y655P67

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/2Y655P67SR7K3A5S5ZJO2S245J \
  | 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: d63ddebfdf947ead83b2ee52ed4b5cea4a542c7d8c263739e18ea6dedbbdb87b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ad1922aa373eabdec1a79ff040decdcb4bf0fa4582d227be3d04e6bc3164e23a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2013-10-22T10:51:58Z",
    "title_canon_sha256": "8aad22e623caab426cdffe1e18753d42db9edbb81535c89acd2383832604dd4a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.5875",
    "kind": "arxiv",
    "version": 2
  }
}