Pith Number

pith:FKYWY7SM

pith:2018:FKYWY7SMKQ6K3HGE6RWLQ5OAHQ

not attested not anchored not stored refs pending

Towards a constructive formalization of Perfect Graph Theorems

Abhishek Kr Singh, Raja Natarajan

arxiv:1812.11108 v1 · 2018-12-28 · cs.LO · cs.DM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FKYWY7SMKQ6K3HGE6RWLQ5OAHQ}

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	2026-05-17T23:57:16.306821Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2ab16c7e4c543cad9cc4f46cb875c03c08f099b478b072c55caf55aad30dfecc

Aliases

arxiv: 1812.11108 · arxiv_version: 1812.11108v1 · doi: 10.48550/arxiv.1812.11108 · pith_short_12: FKYWY7SMKQ6K · pith_short_16: FKYWY7SMKQ6K3HGE · pith_short_8: FKYWY7SM

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/FKYWY7SMKQ6K3HGE6RWLQ5OAHQ \
  | 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: 2ab16c7e4c543cad9cc4f46cb875c03c08f099b478b072c55caf55aad30dfecc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a799274546c67521f46e212fccdbaeeb3b877e99c435fb278be9124af04fc271",
    "cross_cats_sorted": [
      "cs.DM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2018-12-28T16:46:37Z",
    "title_canon_sha256": "2d0230365c29a7ff1e0639dd146c2ab09038d5abd3a1b43f4664f433c9b6ced8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.11108",
    "kind": "arxiv",
    "version": 1
  }
}