Pith Number

pith:B3CV5GJP

pith:2019:B3CV5GJPCRUQN5S63LBWTXPRWG

not attested not anchored not stored refs pending

The Complexity of the Classification Problems of Finite-Dimensional Continua

Cheng Chang, Su Gao

arxiv:1904.09634 v1 · 2019-04-21 · 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{B3CV5GJPCRUQN5S63LBWTXPRWG}

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	2026-05-17T23:48:03.774329Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0ec55e992f146906f65edac369ddf1b1ad0c381cd9a033f80efa29d7b5481251

Aliases

arxiv: 1904.09634 · arxiv_version: 1904.09634v1 · doi: 10.48550/arxiv.1904.09634 · pith_short_12: B3CV5GJPCRUQ · pith_short_16: B3CV5GJPCRUQN5S6 · pith_short_8: B3CV5GJP

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/B3CV5GJPCRUQN5S63LBWTXPRWG \
  | 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: 0ec55e992f146906f65edac369ddf1b1ad0c381cd9a033f80efa29d7b5481251

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a2acff5bf2e884e5e537633cff137d71af7141a301c093fbfce5f97a5b9525b",
    "cross_cats_sorted": [
      "math.GN"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2019-04-21T17:40:05Z",
    "title_canon_sha256": "8def26fe2a19488d81c12e6ae03c3f33926370d7db1b2c5b6ddace3d349538f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.09634",
    "kind": "arxiv",
    "version": 1
  }
}