Pith Number

pith:GG6VPX2U

pith:2019:GG6VPX2UVESZIBWZD36V4HE3K3

not attested not anchored not stored refs pending

Faster algorithms for cograph edge modification problems

Dekel Tsur

arxiv:1908.01223 v3 · 2019-08-03 · cs.DS · cs.DM · 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{GG6VPX2UVESZIBWZD36V4HE3K3}

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	2026-07-05T00:28:51.634511Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

31bd57df54a9259406d91efd5e1c9b56d30712fa403a08a1ec054c0d49462c75

Aliases

arxiv: 1908.01223 · arxiv_version: 1908.01223v3 · doi: 10.48550/arxiv.1908.01223 · pith_short_12: GG6VPX2UVESZ · pith_short_16: GG6VPX2UVESZIBWZ · pith_short_8: GG6VPX2U

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/GG6VPX2UVESZIBWZD36V4HE3K3 \
  | 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: 31bd57df54a9259406d91efd5e1c9b56d30712fa403a08a1ec054c0d49462c75

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9bced15047b13438777f66ee45107d0e00f778adbda1357fde7501ce64d8055a",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2019-08-03T19:42:32Z",
    "title_canon_sha256": "72d3b31ce18dd7556a07d9d841a001496899166806939d5c0e8a407f32241708"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.01223",
    "kind": "arxiv",
    "version": 3
  }
}