Pith Number

pith:UPSWOUVV

pith:2013:UPSWOUVV6VDHX64JDXVVRYM6VN

not attested not anchored not stored refs pending

A DSATUR-based algorithm for the Equitable Coloring Problem

Daniel Severin, Graciela Nasini, Isabel M\'endez-D\'iaz

arxiv:1306.1758 v2 · 2013-06-07 · 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{UPSWOUVV6VDHX64JDXVVRYM6VN}

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	2026-05-18T00:31:59.710867Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a3e56752b5f5467bfb891deb58e19eab785cd9d665c18cbbacc6bc7aade3c814

Aliases

arxiv: 1306.1758 · arxiv_version: 1306.1758v2 · doi: 10.48550/arxiv.1306.1758 · pith_short_12: UPSWOUVV6VDH · pith_short_16: UPSWOUVV6VDHX64J · pith_short_8: UPSWOUVV

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/UPSWOUVV6VDHX64JDXVVRYM6VN \
  | 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: a3e56752b5f5467bfb891deb58e19eab785cd9d665c18cbbacc6bc7aade3c814

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c6bd69da0a1cd7a0686de7f8787220a3ea2c89b4c8346ab3f13e99d5a35440d9",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DM",
    "submitted_at": "2013-06-07T16:00:56Z",
    "title_canon_sha256": "3229aff53be38b9c8f4382ca1ef257f17877f14d39c4e1222ca9ff1a03caece3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.1758",
    "kind": "arxiv",
    "version": 2
  }
}