Pith Number

pith:VRVFA4DO

pith:2011:VRVFA4DOMTEU44UIEVPIJUBA6C

not attested not anchored not stored refs pending

Pancake Flipping is Hard

Guillaume Fertin, Irena Rusu, Laurent Bulteau

arxiv:1111.0434 v2 · 2011-11-02 · cs.CC · 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{VRVFA4DOMTEU44UIEVPIJUBA6C}

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	2026-05-18T03:46:18.530610Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac6a50706e64c94e7288255e84d020f0a04baef94b29e32abf311d4e40e95f85

Aliases

arxiv: 1111.0434 · arxiv_version: 1111.0434v2 · doi: 10.48550/arxiv.1111.0434 · pith_short_12: VRVFA4DOMTEU · pith_short_16: VRVFA4DOMTEU44UI · pith_short_8: VRVFA4DO

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/VRVFA4DOMTEU44UIEVPIJUBA6C \
  | 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: ac6a50706e64c94e7288255e84d020f0a04baef94b29e32abf311d4e40e95f85

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11352c799a4928e1de87cff6ca2aa087d0ccbed60c9556b69ec07d5ed2704435",
    "cross_cats_sorted": [
      "cs.DS"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2011-11-02T09:30:20Z",
    "title_canon_sha256": "0c42de35f2d3e397cb03974b2f56c9606f183fe8d4a9bef88f0a0c3ccfd7c630"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1111.0434",
    "kind": "arxiv",
    "version": 2
  }
}