Pith Number

pith:45NSLHAJ

pith:2019:45NSLHAJKJJX6FN4VKGFS7FQMQ

not attested not anchored not stored refs pending

Revisiting the Graph Isomorphism Problem with Semidefinite Programming

Giannis Nikolentzos, Michalis Vazirgiannis

arxiv:1908.06320 v2 · 2019-08-17 · cs.DS · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{45NSLHAJKJJX6FN4VKGFS7FQMQ}

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	2026-07-05T00:15:08.015934Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e75b259c0952537f15bcaa8c597cb0642acad73fa89e5991a4c5e9f7c01fd801

Aliases

arxiv: 1908.06320 · arxiv_version: 1908.06320v2 · doi: 10.48550/arxiv.1908.06320 · pith_short_12: 45NSLHAJKJJX · pith_short_16: 45NSLHAJKJJX6FN4 · pith_short_8: 45NSLHAJ

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/45NSLHAJKJJX6FN4VKGFS7FQMQ \
  | 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: e75b259c0952537f15bcaa8c597cb0642acad73fa89e5991a4c5e9f7c01fd801

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cfad1b0d1d6ca52d226b232e7cb4ece49c0c97484f78486451b43da5754fd7db",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2019-08-17T17:08:57Z",
    "title_canon_sha256": "ce5beef042df6c546c53db130ad9077064342e19332643adcbc1242fdcb37c37"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.06320",
    "kind": "arxiv",
    "version": 2
  }
}