Pith Number

pith:AFRORQWG

pith:2012:AFRORQWGS5N65WYX4WDCY2GZLA

not attested not anchored not stored refs pending

Flip Distance Between Two Triangulations of a Point-Set is NP-complete

Anna Lubiw, Vinayak Pathak

arxiv:1205.2425 v1 · 2012-05-11 · 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{AFRORQWGS5N65WYX4WDCY2GZLA}

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	2026-05-18T03:55:55.570187Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0162e8c2c6975beedb17e5862c68d9580d342ef1e32ad8806aaf8e78f2ca5bd5

Aliases

arxiv: 1205.2425 · arxiv_version: 1205.2425v1 · doi: 10.48550/arxiv.1205.2425 · pith_short_12: AFRORQWGS5N6 · pith_short_16: AFRORQWGS5N65WYX · pith_short_8: AFRORQWG

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/AFRORQWGS5N65WYX4WDCY2GZLA \
  | 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: 0162e8c2c6975beedb17e5862c68d9580d342ef1e32ad8806aaf8e78f2ca5bd5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6eb221aca27c06e5a8b783610288befefb13ada26b4da721aa15f015dfbe7adf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2012-05-11T03:50:31Z",
    "title_canon_sha256": "d719f71746ee1bdd0f684e2372ca3aa7d3782a5be8dd368fdcc1b6c31b20c57b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.2425",
    "kind": "arxiv",
    "version": 1
  }
}