Pith Number

pith:WQIIYA2U

pith:2017:WQIIYA2U5HBR4CYAFTVDSURJXV

not attested not anchored not stored refs pending

On Eigenvalues of Laplacian Matrix for a Class of Directed Signed Graphs

Dragan Nesic, Iman Shames, Saeed Ahmadizadeh, Samuel Martin

arxiv:1705.04406 v1 · 2017-05-12 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WQIIYA2U5HBR4CYAFTVDSURJXV}

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	2026-05-18T00:44:38.197745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4108c0354e9c31e0b002cea395229bd7cda4a4c4b17311496bba34d85d34611

Aliases

arxiv: 1705.04406 · arxiv_version: 1705.04406v1 · doi: 10.48550/arxiv.1705.04406 · pith_short_12: WQIIYA2U5HBR · pith_short_16: WQIIYA2U5HBR4CYA · pith_short_8: WQIIYA2U

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/WQIIYA2U5HBR4CYAFTVDSURJXV \
  | 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: b4108c0354e9c31e0b002cea395229bd7cda4a4c4b17311496bba34d85d34611

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4d1f2e634b94854d96d9438dd062ebb722fff017b66790335c3b18d5acde761e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-05-12T00:07:06Z",
    "title_canon_sha256": "1860fc098d11cf80ac9f0a965cb2d867b60e0bf05767986e3251171d8867ff29"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.04406",
    "kind": "arxiv",
    "version": 1
  }
}