Pith Number

pith:XFVC3TUI

pith:2018:XFVC3TUIPK326NCT32UU3YQ5XA

not attested not anchored not stored refs pending

Equiangular lines and the Lemmens-Seidel conjecture

Wei-Hsuan Yu, Yen-chi Roger Lin

arxiv:1807.06249 v4 · 2018-07-17 · 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{XFVC3TUIPK326NCT32UU3YQ5XA}

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.

Cited by

1 paper in Pith

Open problems in the spectral theory of signed graphs

Receipt and verification

First computed	2026-07-05T00:00:22.865059Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b96a2dce887ab7af3453dea94de21db829dce1e8873a0b4b1faa4c6d35f44089

Aliases

arxiv: 1807.06249 · arxiv_version: 1807.06249v4 · doi: 10.48550/arxiv.1807.06249 · pith_short_12: XFVC3TUIPK32 · pith_short_16: XFVC3TUIPK326NCT · pith_short_8: XFVC3TUI

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/XFVC3TUIPK326NCT32UU3YQ5XA \
  | 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: b96a2dce887ab7af3453dea94de21db829dce1e8873a0b4b1faa4c6d35f44089

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17a4401ab5f06cc5aa519bff6282b2b3558458846a138acbe2b927013dabba91",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-07-17T06:57:30Z",
    "title_canon_sha256": "9a49c39066b0e59c37bef687805b70701f143f70d4e4d26a1db1073f12257b24"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.06249",
    "kind": "arxiv",
    "version": 4
  }
}