Pith Number

pith:ETUH3NPR

pith:2013:ETUH3NPRS2X6YCG2ASF6266L7X

not attested not anchored not stored refs pending

Computing the Fr\'{e}chet distance with shortcuts is NP-hard

Anne Driemel, Bettina Speckmann, Maike Buchin

arxiv:1307.2097 v2 · 2013-07-08 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ETUH3NPRS2X6YCG2ASF6266L7X}

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	2026-05-18T03:05:35.477478Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

24e87db5f196afec08da048bed7bcbfddcc98897d7d01d5e00b6bd9c63576727

Aliases

arxiv: 1307.2097 · arxiv_version: 1307.2097v2 · doi: 10.48550/arxiv.1307.2097 · pith_short_12: ETUH3NPRS2X6 · pith_short_16: ETUH3NPRS2X6YCG2 · pith_short_8: ETUH3NPR

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/ETUH3NPRS2X6YCG2ASF6266L7X \
  | 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: 24e87db5f196afec08da048bed7bcbfddcc98897d7d01d5e00b6bd9c63576727

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37132dd6df5ad2e11f4917364bfb61cba7c955913f498d93db8d41f859cb4976",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2013-07-08T14:02:31Z",
    "title_canon_sha256": "a0f90edd051e9a59365d972ce4d359c644701d3aec6786ff190963f637320cb5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1307.2097",
    "kind": "arxiv",
    "version": 2
  }
}