Pith Number

pith:ZWHH4B6H

pith:2014:ZWHH4B6HWFN7FD32XDCMCU3AFR

not attested not anchored not stored refs pending

AC-Feasibility on Tree Networks is NP-Hard

Alban Grastien, Karsten Lehmann, Pascal Van Hentenryck

arxiv:1410.8253 v1 · 2014-10-30 · cs.CC · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZWHH4B6HWFN7FD32XDCMCU3AFR}

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	2026-05-18T02:39:00.239373Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cd8e7e07c7b15bf28f7ab8c4c153602c40020e73c4b06615613bdeb4cf4f87ea

Aliases

arxiv: 1410.8253 · arxiv_version: 1410.8253v1 · doi: 10.48550/arxiv.1410.8253 · pith_short_12: ZWHH4B6HWFN7 · pith_short_16: ZWHH4B6HWFN7FD32 · pith_short_8: ZWHH4B6H

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/ZWHH4B6HWFN7FD32XDCMCU3AFR \
  | 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: cd8e7e07c7b15bf28f7ab8c4c153602c40020e73c4b06615613bdeb4cf4f87ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b85914eb13dfdc556498a64f9d680a00f2e4685eef43cb30a862caaa70444dbb",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2014-10-30T04:50:34Z",
    "title_canon_sha256": "1da4c5abc940a6fdb5fd6b86a303a43dc3102421fcf3adbf97f9850e9dc0b7e8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1410.8253",
    "kind": "arxiv",
    "version": 1
  }
}