Pith Number

pith:MMFLQEHK

pith:2018:MMFLQEHK7BDXQA7ERG6RGUPHCM

not attested not anchored not stored refs pending

Cantor-Bendixson type ranks on Polish spaces

Vibeke Quorning

arxiv:1806.03206 v1 · 2018-06-08 · math.LO · math.GN

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MMFLQEHK7BDXQA7ERG6RGUPHCM}

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	2026-05-18T00:13:49.255459Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

630ab810eaf8477803e489bd1351e71309f18efc14acc29ccc6cad03961b36ee

Aliases

arxiv: 1806.03206 · arxiv_version: 1806.03206v1 · doi: 10.48550/arxiv.1806.03206 · pith_short_12: MMFLQEHK7BDX · pith_short_16: MMFLQEHK7BDXQA7E · pith_short_8: MMFLQEHK

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/MMFLQEHK7BDXQA7ERG6RGUPHCM \
  | 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: 630ab810eaf8477803e489bd1351e71309f18efc14acc29ccc6cad03961b36ee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "553a68428f7d16dfa5fc87fe7e7f333c6d1d5425e6420d4e4d99434bb0f35a48",
    "cross_cats_sorted": [
      "math.GN"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2018-06-08T15:00:33Z",
    "title_canon_sha256": "b8afa50aa32335ea542a3274bc160e5af9d9e299303b4301f08d5a5e3b9fe80d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.03206",
    "kind": "arxiv",
    "version": 1
  }
}