Pith Number

pith:EHKAQCUD

pith:2011:EHKAQCUDREYQA4GV2MRN2MGCHY

not attested not anchored not stored refs pending

Parameterized Eulerian Strong Component Arc Deletion Problem on Tournaments

Anders Yeo, Gregory Gutin, Mark Jones, Robert Crowston

arxiv:1106.4454 v2 · 2011-06-22 · cs.DS · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EHKAQCUDREYQA4GV2MRN2MGCHY}

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	2026-05-18T04:07:52.532786Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21d4080a8389310070d5d322dd30c23e0fa6fc9c7a29b9f4e911eef7563d1144

Aliases

arxiv: 1106.4454 · arxiv_version: 1106.4454v2 · doi: 10.48550/arxiv.1106.4454 · pith_short_12: EHKAQCUDREYQ · pith_short_16: EHKAQCUDREYQA4GV · pith_short_8: EHKAQCUD

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/EHKAQCUDREYQA4GV2MRN2MGCHY \
  | 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: 21d4080a8389310070d5d322dd30c23e0fa6fc9c7a29b9f4e911eef7563d1144

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "41708807c51e1a2f2daa4d6b6cc4f1a43e95135092bdee94c9339fb3f395a800",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.DS",
    "submitted_at": "2011-06-22T14:13:10Z",
    "title_canon_sha256": "27447f52d33991a03c72444f829903c43d2bffcf856d1790d7f3dee8100ae131"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.4454",
    "kind": "arxiv",
    "version": 2
  }
}