Pith Number

pith:UYWCQUBJ

pith:2013:UYWCQUBJ3UMBWDARJDOU5UABSH

not attested not anchored not stored refs pending

A Continuous Refinement Strategy for the Multilevel Computation of Vertex Separators

Ilya Safro, James Hungerford, William Hager

arxiv:1311.5930 v1 · 2013-11-22 · 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{UYWCQUBJ3UMBWDARJDOU5UABSH}

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	2026-05-18T03:06:21.055786Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a62c285029dd181b0c1148dd4ed00191ca4b91b8da7dc74679038695b6a80eca

Aliases

arxiv: 1311.5930 · arxiv_version: 1311.5930v1 · doi: 10.48550/arxiv.1311.5930 · pith_short_12: UYWCQUBJ3UMB · pith_short_16: UYWCQUBJ3UMBWDAR · pith_short_8: UYWCQUBJ

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/UYWCQUBJ3UMBWDARJDOU5UABSH \
  | 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: a62c285029dd181b0c1148dd4ed00191ca4b91b8da7dc74679038695b6a80eca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12216455e56f762582f08db6feeaf03e1bb6be63a89665f8e0be094f8ddff44a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2013-11-22T23:45:24Z",
    "title_canon_sha256": "ca920768a7c40b2c58cbe8b960a29c09582471a184c6757e634e602f91aa69c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1311.5930",
    "kind": "arxiv",
    "version": 1
  }
}