Pith Number

pith:7KOS2YO2

pith:2026:7KOS2YO2T4AZHLYR5QZ65DUFMD

not attested not anchored not stored refs pending

k-Coloring is Faster than Computing the Chromatic Number

Or Zamir

arxiv:2607.25973 v1 · 2026-07-28 · cs.DS

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7KOS2YO2T4AZHLYR5QZ65DUFMD}

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	2026-07-29T01:26:17.237091Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa9d2d61da9f0193af11ec33ee8e8560facb8e4e05e2fe0e3457859c6ae84e44

Aliases

arxiv: 2607.25973 · arxiv_version: 2607.25973v1 · doi: 10.48550/arxiv.2607.25973 · pith_short_12: 7KOS2YO2T4AZ · pith_short_16: 7KOS2YO2T4AZHLYR · pith_short_8: 7KOS2YO2

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/7KOS2YO2T4AZHLYR5QZ65DUFMD \
  | 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: fa9d2d61da9f0193af11ec33ee8e8560facb8e4e05e2fe0e3457859c6ae84e44

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e80a34b17eabbbaa71bbf5d0e8c144c124592bbb23b5c8acd2f01f4905f9e9d8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2026-07-28T16:53:58Z",
    "title_canon_sha256": "58c723ba9efda34ed0648e55ad972b0b03fca9603beafec5bce5e00ae6c0831e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.25973",
    "kind": "arxiv",
    "version": 1
  }
}