Pith Number

pith:GM4V6TL6

pith:2013:GM4V6TL6NMIZSULGLFGAC33F3T

not attested not anchored not stored refs pending

Application of semidefinite programming to maximize the spectral gap produced by node removal

Kazuo Murota, Naoki Masuda, Tetsuya Fujie

arxiv:1301.1503 v1 · 2013-01-08 · cond-mat.dis-nn · 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{GM4V6TL6NMIZSULGLFGAC33F3T}

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	2026-05-18T03:36:57.301408Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

33395f4d7e6b11995166594c016f65dcc2b0d83b8fcaddb4c355bed36704ce92

Aliases

arxiv: 1301.1503 · arxiv_version: 1301.1503v1 · doi: 10.48550/arxiv.1301.1503 · pith_short_12: GM4V6TL6NMIZ · pith_short_16: GM4V6TL6NMIZSULG · pith_short_8: GM4V6TL6

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/GM4V6TL6NMIZSULGLFGAC33F3T \
  | 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: 33395f4d7e6b11995166594c016f65dcc2b0d83b8fcaddb4c355bed36704ce92

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd085eb221ad9e2a498143bfdebd1c225c1cdb4b2283f3185d56a2babf544e78",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cond-mat.dis-nn",
    "submitted_at": "2013-01-08T11:52:24Z",
    "title_canon_sha256": "bea8fbebe9a096c31acd63429deaaedc9c85588b6b3ab68bc7d6707844a072db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.1503",
    "kind": "arxiv",
    "version": 1
  }
}