Pith Number

pith:BLMRB6NB

pith:2012:BLMRB6NBZXQFHVENRDBGAXRRDG

not attested not anchored not stored refs pending

Flip Distance Between Triangulations of a Planar Point Set is APX-Hard

Alexander Pilz

arxiv:1206.3179 v3 · 2012-06-14 · 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{BLMRB6NBZXQFHVENRDBGAXRRDG}

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	2026-05-18T02:14:18.334509Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ad910f9a1cde053d48d88c2605e3119912f0d6bb6362ceb1e68531d5084dbf2

Aliases

arxiv: 1206.3179 · arxiv_version: 1206.3179v3 · doi: 10.48550/arxiv.1206.3179 · pith_short_12: BLMRB6NBZXQF · pith_short_16: BLMRB6NBZXQFHVEN · pith_short_8: BLMRB6NB

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/BLMRB6NBZXQFHVENRDBGAXRRDG \
  | 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: 0ad910f9a1cde053d48d88c2605e3119912f0d6bb6362ceb1e68531d5084dbf2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "54e343b72bc02059b83de1df1a951abc0f2c4acbbe3b20793f5125126aecc556",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2012-06-14T17:01:42Z",
    "title_canon_sha256": "153ef9e946cc90882ad29db2a5debbffe3c65760b593e6f6a1704e0acd7485c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1206.3179",
    "kind": "arxiv",
    "version": 3
  }
}