Pith Number

pith:UV7XRPF4

pith:2013:UV7XRPF4XOKFAMC6COGHDKVJ6N

not attested not anchored not stored refs pending

Improved approximation algorithm for k-level UFL with penalties, a simplistic view on randomizing the scaling parameter

Bartosz Rybicki, Jaroslaw Byrka, Shanfei Li

arxiv:1310.2386 v1 · 2013-10-09 · 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{UV7XRPF4XOKFAMC6COGHDKVJ6N}

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	2026-05-18T00:56:53.602279Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a57f78bcbcbb9450305e138c71aaa9f37913c94576498213f8d5e79bc8c8dfb5

Aliases

arxiv: 1310.2386 · arxiv_version: 1310.2386v1 · doi: 10.48550/arxiv.1310.2386 · pith_short_12: UV7XRPF4XOKF · pith_short_16: UV7XRPF4XOKFAMC6 · pith_short_8: UV7XRPF4

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/UV7XRPF4XOKFAMC6COGHDKVJ6N \
  | 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: a57f78bcbcbb9450305e138c71aaa9f37913c94576498213f8d5e79bc8c8dfb5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ecc239d26aab982676a8690e40ad83577b9f749d1c622e3e5f3cd30c3a246c06",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2013-10-09T08:09:20Z",
    "title_canon_sha256": "edf637b05da0de737a584042be13856caecfee769f4380c342099afeb89ce240"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.2386",
    "kind": "arxiv",
    "version": 1
  }
}