Pith Number

pith:JWY7IVDK

pith:2017:JWY7IVDKXQ6CND7OVXOPUIAODQ

not attested not anchored not stored refs pending

Notes on complexity of packing coloring

Bernard Lidick\'y, Florian Pfender, Minki Kim, Tom\'a\v{s} Masa\v{r}\'ik

arxiv:1712.08373 v1 · 2017-12-22 · 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{JWY7IVDKXQ6CND7OVXOPUIAODQ}

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	2026-05-18T00:15:28.340713Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4db1f4546abc3c268feeaddcfa200e1c3c9a34ca82bfca3f0b7d8d7dceb1c0b7

Aliases

arxiv: 1712.08373 · arxiv_version: 1712.08373v1 · doi: 10.48550/arxiv.1712.08373 · pith_short_12: JWY7IVDKXQ6C · pith_short_16: JWY7IVDKXQ6CND7O · pith_short_8: JWY7IVDK

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/JWY7IVDKXQ6CND7OVXOPUIAODQ \
  | 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: 4db1f4546abc3c268feeaddcfa200e1c3c9a34ca82bfca3f0b7d8d7dceb1c0b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b761845b403ee57a3fc5084b2625490e7ce9ccfbc9a7af528c849ec2b5bfb0ca",
    "cross_cats_sorted": [
      "cs.DM",
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2017-12-22T10:00:07Z",
    "title_canon_sha256": "a44ef73151d4aa22da6399cf3b9b1eac63839f5b8a22dc8a233fe10da7d5ab5e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.08373",
    "kind": "arxiv",
    "version": 1
  }
}