Pith Number

pith:BMYUBSZV

pith:2010:BMYUBSZVNDGCKUDU7XKFDKJEBK

not attested not anchored not stored refs pending

A construction of cospectral graphs for the normalized Laplacian

Jason Grout, Steve Butler

arxiv:1008.3646 v2 · 2010-08-21 · math.CO

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BMYUBSZVNDGCKUDU7XKFDKJEBK}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more

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.

Cited by

1 paper in Pith

SEER: Spectral Entropy Encoding of Roles for Context-Aware Attention-Based Design Pattern Detection

Receipt and verification

First computed	2026-05-18T04:03:54.688253Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b3140cb3568cc255074fdd451a9240ab503383db44194c6f07c2e1c492c8302

Aliases

arxiv: 1008.3646 · arxiv_version: 1008.3646v2 · doi: 10.48550/arxiv.1008.3646 · pith_short_12: BMYUBSZVNDGC · pith_short_16: BMYUBSZVNDGCKUDU · pith_short_8: BMYUBSZV

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/BMYUBSZVNDGCKUDU7XKFDKJEBK \
  | 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: 0b3140cb3568cc255074fdd451a9240ab503383db44194c6f07c2e1c492c8302

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2fd52c18cfa0e2490c64dd3b3083d2001c0cfa6a29ef80f29ad57d6fd2f8d3a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2010-08-21T17:04:00Z",
    "title_canon_sha256": "b3c2a7059827daf4ee6f20ffd305416f905bc510e2762cb73d11362453229800"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.3646",
    "kind": "arxiv",
    "version": 2
  }
}