Pith Number

pith:NGRMEYZ3

pith:2013:NGRMEYZ3LQW6I25TRMGDDOKS2Y

not attested not anchored not stored refs pending

Lelek fan from a projective Fraisse limit

Aleksandra Kwiatkowska, Dana Bartosova

arxiv:1312.7514 v2 · 2013-12-29 · math.GN · math.GR · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NGRMEYZ3LQW6I25TRMGDDOKS2Y}

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	2026-05-18T02:12:11.634521Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69a2c2633b5c2de46bb38b0c31b952d62f08cea6fa85a6473fbfdee73f15e9d1

Aliases

arxiv: 1312.7514 · arxiv_version: 1312.7514v2 · doi: 10.48550/arxiv.1312.7514 · pith_short_12: NGRMEYZ3LQW6 · pith_short_16: NGRMEYZ3LQW6I25T · pith_short_8: NGRMEYZ3

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/NGRMEYZ3LQW6I25TRMGDDOKS2Y \
  | 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: 69a2c2633b5c2de46bb38b0c31b952d62f08cea6fa85a6473fbfdee73f15e9d1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "82178045e7486901f2a50e3215af253363560a6b923aa13778dfa20cf5e173c9",
    "cross_cats_sorted": [
      "math.GR",
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2013-12-29T10:18:36Z",
    "title_canon_sha256": "cb0b2066e4779fe3016f2d3342e11ecead5d1e23eb2176cb14fa60166fbf7d49"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.7514",
    "kind": "arxiv",
    "version": 2
  }
}