Pith Number

pith:OKW5RA52

pith:2019:OKW5RA52SDPADJY5SIXL3K7QFQ

not attested not anchored not stored refs pending

On the eigenvalues of some signed graphs

F. Heydari, M. Maghasedi, M. Souri

arxiv:1902.00747 v1 · 2019-02-02 · 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{OKW5RA52SDPADJY5SIXL3K7QFQ}

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	2026-05-17T23:54:52.283928Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

72add883ba90de01a71d922ebdabf02c2aae4b990a11a32df08096601b2a2120

Aliases

arxiv: 1902.00747 · arxiv_version: 1902.00747v1 · doi: 10.48550/arxiv.1902.00747 · pith_short_12: OKW5RA52SDPA · pith_short_16: OKW5RA52SDPADJY5 · pith_short_8: OKW5RA52

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/OKW5RA52SDPADJY5SIXL3K7QFQ \
  | 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: 72add883ba90de01a71d922ebdabf02c2aae4b990a11a32df08096601b2a2120

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8227c8d33ff7574daed06a4da389b14de365c12ad03644e64c23165d2ef591d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2019-02-02T16:23:57Z",
    "title_canon_sha256": "bb542c7d0d035c8a3997aac0d4fc33a1411fbabca2812c0d807e251c4b8fbd74"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.00747",
    "kind": "arxiv",
    "version": 1
  }
}