Pith Number

pith:7CVEUK5A

pith:2019:7CVEUK5AOHHX47WHTER5Z6FMEU

not attested not anchored not stored refs pending

Computability on quasi-Polish spaces

Cristobal Rojas, Donald M. Stull, Mathieu Hoyrup, Victor Selivanov

arxiv:1903.02979 v3 · 2019-03-07 · 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{7CVEUK5AOHHX47WHTER5Z6FMEU}

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	2026-05-17T23:46:52.751371Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f8aa4a2ba071cf7e7ec79923dcf8ac2506d7a3e882d6f216a3174a7708ef2e20

Aliases

arxiv: 1903.02979 · arxiv_version: 1903.02979v3 · doi: 10.48550/arxiv.1903.02979 · pith_short_12: 7CVEUK5AOHHX · pith_short_16: 7CVEUK5AOHHX47WH · pith_short_8: 7CVEUK5A

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/7CVEUK5AOHHX47WHTER5Z6FMEU \
  | 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: f8aa4a2ba071cf7e7ec79923dcf8ac2506d7a3e882d6f216a3174a7708ef2e20

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ecadab27becb8cc4dbae799227217c7477753df4c1fed90f283d1b449e99d0d2",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2019-03-07T15:14:54Z",
    "title_canon_sha256": "3a4f5affcb716f22ddfeb98cb9e84a03e5670d2d46994272045286260a49f7dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.02979",
    "kind": "arxiv",
    "version": 3
  }
}