Pith Number

pith:5LT3QEPS

pith:2016:5LT3QEPSQVZDVC5TO2QWUPMHI5

not attested not anchored not stored refs pending

Online Chromatic Number is PSPACE-Complete

Martin B\"ohm, Pavel Vesel\'y

arxiv:1604.05940 v2 · 2016-04-20 · cs.CC · 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{5LT3QEPSQVZDVC5TO2QWUPMHI5}

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	2026-05-18T00:41:46.475448Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

eae7b811f285723a8bb376a16a3d874779ddffd5f3652439cfd162a718656849

Aliases

arxiv: 1604.05940 · arxiv_version: 1604.05940v2 · doi: 10.48550/arxiv.1604.05940 · pith_short_12: 5LT3QEPSQVZD · pith_short_16: 5LT3QEPSQVZDVC5T · pith_short_8: 5LT3QEPS

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/5LT3QEPSQVZDVC5TO2QWUPMHI5 \
  | 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: eae7b811f285723a8bb376a16a3d874779ddffd5f3652439cfd162a718656849

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d63df806f7b0cea2039961b300722969106c38ddf501d9204630ae54b2c1f45d",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2016-04-20T13:10:22Z",
    "title_canon_sha256": "2e217e99d3181e51597580a1546f2aeec88cd6a9ce719d9347b59fb6700c0047"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1604.05940",
    "kind": "arxiv",
    "version": 2
  }
}