Pith Number

pith:Y4DB4F5E

pith:2011:Y4DB4F5ETN2RPCSTZ7QH5XCQXS

not attested not anchored not stored refs pending

Contracting Graphs to Paths and Trees

Benjamin L\'ev\^eque, Christophe Paul, Daniel Lokshtanov, Pim van 't Hof, Pinar Heggernes

arxiv:1104.3677 v1 · 2011-04-19 · 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{Y4DB4F5ETN2RPCSTZ7QH5XCQXS}

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	2026-05-18T04:23:55.834001Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c7061e17a49b75178a53cfe07edc50bca66cd4b550b0b2fbd27ec659d3abc536

Aliases

arxiv: 1104.3677 · arxiv_version: 1104.3677v1 · doi: 10.48550/arxiv.1104.3677 · pith_short_12: Y4DB4F5ETN2R · pith_short_16: Y4DB4F5ETN2RPCST · pith_short_8: Y4DB4F5E

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/Y4DB4F5ETN2RPCSTZ7QH5XCQXS \
  | 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: c7061e17a49b75178a53cfe07edc50bca66cd4b550b0b2fbd27ec659d3abc536

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1a2a4d13e6db108fef2035d90f2719b001ba60705af8f2bc10d01ba5f245139b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-04-19T08:49:35Z",
    "title_canon_sha256": "14b6ce4f7ecb74a8d2c0a38290bd0b626edcaef06b11709417841b7e9b1c7e01"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1104.3677",
    "kind": "arxiv",
    "version": 1
  }
}