Pith Number

pith:L4XLDFLQ

pith:2014:L4XLDFLQT2IHEFWYCSZB4NJE2P

not attested not anchored not stored refs pending

A note on the pentagram map and tropical geometry

Tsuyoshi Kato

arxiv:1405.0084 v1 · 2014-05-01 · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{L4XLDFLQT2IHEFWYCSZB4NJE2P}

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	2026-05-18T02:52:49.044290Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5f2eb195709e907216d814b21e3524d3e7b5c74465055ba18e1f7b398f7ad1ea

Aliases

arxiv: 1405.0084 · arxiv_version: 1405.0084v1 · doi: 10.48550/arxiv.1405.0084 · pith_short_12: L4XLDFLQT2IH · pith_short_16: L4XLDFLQT2IHEFWY · pith_short_8: L4XLDFLQ

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/L4XLDFLQT2IHEFWYCSZB4NJE2P \
  | 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: 5f2eb195709e907216d814b21e3524d3e7b5c74465055ba18e1f7b398f7ad1ea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c9b94640285a9ad944b36873f9884caa773d6a031465365ec3e7995175a74a46",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2014-05-01T03:30:24Z",
    "title_canon_sha256": "867ff01c043dfb82819f9e5c47096cd635dfc38455ce8796401cbf5250a4fed2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.0084",
    "kind": "arxiv",
    "version": 1
  }
}