Pith Number

pith:UBFXUL2E

pith:2014:UBFXUL2ELVS2ZMBQ53IOLWE3PJ

not attested not anchored not stored refs pending

Some Spectral and Quasi-Spectral Characterizations of Distance-Regular Graphs

A. Abiad, E.R. van Dam, M.A. Fiol

arxiv:1404.3973 v4 · 2014-04-15 · 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{UBFXUL2ELVS2ZMBQ53IOLWE3PJ}

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	2026-05-18T01:16:53.628177Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a04b7a2f445d65acb030eed0e5d89b7a6f50f234675a6a540f73d6026705f188

Aliases

arxiv: 1404.3973 · arxiv_version: 1404.3973v4 · doi: 10.48550/arxiv.1404.3973 · pith_short_12: UBFXUL2ELVS2 · pith_short_16: UBFXUL2ELVS2ZMBQ · pith_short_8: UBFXUL2E

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/UBFXUL2ELVS2ZMBQ53IOLWE3PJ \
  | 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: a04b7a2f445d65acb030eed0e5d89b7a6f50f234675a6a540f73d6026705f188

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b39340ee1830380cf3d53924f386a2710ebc4f874d9eece6d06c1719080e447b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-04-15T16:24:01Z",
    "title_canon_sha256": "b95ddd2f03c1bd7a070c9452babe525f1027e5289e52f83bc6890c3155f9bc51"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.3973",
    "kind": "arxiv",
    "version": 4
  }
}