Pith Number

pith:XJYSE6JX

pith:2009:XJYSE6JXSR6GPRSNCEPEENMHSI

not attested not anchored not stored refs pending

Covering dimension and finite-to-one maps

Jan van Mill, Klaas Pieter Hart

arxiv:0910.4107 v1 · 2009-10-21 · math.GN · 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{XJYSE6JXSR6GPRSNCEPEENMHSI}

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	2026-05-18T03:02:21.639051Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ba71227937947c67c64d111e423587921e29753c540558cd2ae969d2d2dea878

Aliases

arxiv: 0910.4107 · arxiv_version: 0910.4107v1 · doi: 10.48550/arxiv.0910.4107 · pith_short_12: XJYSE6JXSR6G · pith_short_16: XJYSE6JXSR6GPRSN · pith_short_8: XJYSE6JX

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/XJYSE6JXSR6GPRSNCEPEENMHSI \
  | 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: ba71227937947c67c64d111e423587921e29753c540558cd2ae969d2d2dea878

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17dc24640d0bf56cc5eb94c66af7a9b855b095299f4b88e60fac9547a93931f6",
    "cross_cats_sorted": [
      "math.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2009-10-21T14:48:11Z",
    "title_canon_sha256": "10c31c9f1516cedf3047e56b3d8087557eaf809ef31993300be798a1e26d9196"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0910.4107",
    "kind": "arxiv",
    "version": 1
  }
}