Pith Number

pith:LSDTEEQV

pith:2014:LSDTEEQVULJHLGG4LZC255UUU6

not attested not anchored not stored refs pending

On the Isomorphism Problem for Helly Circular-Arc Graphs

Johannes K\"obler, Oleg Verbitsky, Sebastian Kuhnert

arxiv:1402.4642 v2 · 2014-02-19 · cs.CC · 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{LSDTEEQVULJHLGG4LZC255UUU6}

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	2026-05-18T00:46:08.596439Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5c87321215a2d27598dc5e45aef694a78e6dadd5c2c78d8ff2d832cb4e2b5982

Aliases

arxiv: 1402.4642 · arxiv_version: 1402.4642v2 · doi: 10.48550/arxiv.1402.4642 · pith_short_12: LSDTEEQVULJH · pith_short_16: LSDTEEQVULJHLGG4 · pith_short_8: LSDTEEQV

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/LSDTEEQVULJHLGG4LZC255UUU6 \
  | 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: 5c87321215a2d27598dc5e45aef694a78e6dadd5c2c78d8ff2d832cb4e2b5982

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7ccf5361550bbd2131e1bfe866451d6922794841020cf8360b5a65ec2ef064b",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2014-02-19T12:32:59Z",
    "title_canon_sha256": "34ead7d6f6f5677e96b893688aad3b8b1e3690d24624aeca3d47e25092f0cbcd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.4642",
    "kind": "arxiv",
    "version": 2
  }
}