Pith Number

pith:BPRMWYBD

pith:2017:BPRMWYBDRZJFTOTN6IIWI6ZUBZ

not attested not anchored not stored refs pending

The Eigenvalues of the Graphs $D(4,q)$

G. Eric Moorhouse, Jason Williford, Shuying Sun

arxiv:1701.03685 v1 · 2017-01-13 · 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{BPRMWYBDRZJFTOTN6IIWI6ZUBZ}

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	2026-05-18T00:52:54.147600Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0be2cb60238e5259ba6df211647b340e6d542dd3d7d31473595fc0b78e30d78b

Aliases

arxiv: 1701.03685 · arxiv_version: 1701.03685v1 · doi: 10.48550/arxiv.1701.03685 · pith_short_12: BPRMWYBDRZJF · pith_short_16: BPRMWYBDRZJFTOTN · pith_short_8: BPRMWYBD

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/BPRMWYBDRZJFTOTN6IIWI6ZUBZ \
  | 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: 0be2cb60238e5259ba6df211647b340e6d542dd3d7d31473595fc0b78e30d78b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fddf84542068eb1636e8bc9497239f3471e7dde6131e647799597cfbea444bb8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-01-13T14:28:35Z",
    "title_canon_sha256": "ac7e2e7394da4530fb971ce9f1cc97040c64f83a1eb6ae9c30ffdf7a5a6dad17"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.03685",
    "kind": "arxiv",
    "version": 1
  }
}