Pith Number

pith:NF2P4LYT

pith:2015:NF2P4LYTNFAELBOQCICZTMQR5M

not attested not anchored not stored refs pending

Discrete Morse theory for moduli spaces of flexible polygons, or solitaire game on the circle

Alena Zhukova, Gaiane Panina

arxiv:1504.05139 v2 · 2015-04-20 · math.AT · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NF2P4LYTNFAELBOQCICZTMQR5M}

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	2026-05-18T01:22:08.049302Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6974fe2f1369404585d0120599b211eb15d4ad483c248ae18fec892969ea4bfa

Aliases

arxiv: 1504.05139 · arxiv_version: 1504.05139v2 · doi: 10.48550/arxiv.1504.05139 · pith_short_12: NF2P4LYTNFAE · pith_short_16: NF2P4LYTNFAELBOQ · pith_short_8: NF2P4LYT

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/NF2P4LYTNFAELBOQCICZTMQR5M \
  | 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: 6974fe2f1369404585d0120599b211eb15d4ad483c248ae18fec892969ea4bfa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "39119362a0362da7a6404a69dbcb299420512587f36f801f99e1fa84008abee1",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2015-04-20T17:59:57Z",
    "title_canon_sha256": "5371e95097adc01a87cad8340b751e8b9219713f5eca70fc8ade925eeb9bbe30"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.05139",
    "kind": "arxiv",
    "version": 2
  }
}