Pith Number

pith:MZYLDVSA

pith:2014:MZYLDVSA7JDXEQ3EVWX2EJ2P4M

not attested not anchored not stored refs pending

Constrained colouring and $\sigma$-hypergraphs

Christina Zarb, Josef Lauri, Yair Caro

arxiv:1401.1920 v1 · 2014-01-09 · 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{MZYLDVSA7JDXEQ3EVWX2EJ2P4M}

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	2026-05-18T03:02:56.222882Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6670b1d640fa47724364adafa2274fe30355f2261a0c1c025220d3c07239e584

Aliases

arxiv: 1401.1920 · arxiv_version: 1401.1920v1 · doi: 10.48550/arxiv.1401.1920 · pith_short_12: MZYLDVSA7JDX · pith_short_16: MZYLDVSA7JDXEQ3E · pith_short_8: MZYLDVSA

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/MZYLDVSA7JDXEQ3EVWX2EJ2P4M \
  | 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: 6670b1d640fa47724364adafa2274fe30355f2261a0c1c025220d3c07239e584

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1bf0204a49b3deac2190e10044f80bac51701c14ff3cc7bb9203e9b6d3e423f1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-01-09T08:09:44Z",
    "title_canon_sha256": "879d324d0c4393e5308272b9b34ce00cbcbfd4f563002039512e4eaa49ebe519"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.1920",
    "kind": "arxiv",
    "version": 1
  }
}