Pith Number

pith:ORDUEN7T

pith:2013:ORDUEN7T34N7R7JUPSKLSD2AZF

not attested not anchored not stored refs pending

Fixed parameter tractability of crossing minimization of almost-trees

David Eppstein, Joseph A. Simons, Michael J. Bannister

arxiv:1308.5741 v1 · 2013-08-27 · cs.CG · 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{ORDUEN7T34N7R7JUPSKLSD2AZF}

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	2026-05-18T03:14:38.749653Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

74474237f3df1bf8fd347c94b90f40c94c466a63953395c6d0ac8f02b11d52fe

Aliases

arxiv: 1308.5741 · arxiv_version: 1308.5741v1 · doi: 10.48550/arxiv.1308.5741 · pith_short_12: ORDUEN7T34N7 · pith_short_16: ORDUEN7T34N7R7JU · pith_short_8: ORDUEN7T

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/ORDUEN7T34N7R7JUPSKLSD2AZF \
  | 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: 74474237f3df1bf8fd347c94b90f40c94c466a63953395c6d0ac8f02b11d52fe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2e67e1900676d31f9771629bf986dd51c0fc5763709ed0768ceda790c7d4196",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2013-08-27T02:45:22Z",
    "title_canon_sha256": "d919b257d7e789796315dbd8600829f24dde838de280a66342939ffbb25208f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.5741",
    "kind": "arxiv",
    "version": 1
  }
}