Pith Number

pith:7WR55YTC

pith:2011:7WR55YTC3DWRY3CBVET5WBTK3O

not attested not anchored not stored refs pending

Computability of the Radon-Nikodym derivative

Cristobal Rojas, Klaus Weihrauch, Mathieu Hoyrup

arxiv:1112.2838 v1 · 2011-12-13 · 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{7WR55YTC3DWRY3CBVET5WBTK3O}

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	2026-05-18T04:06:32.303560Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fda3dee262d8ed1c6c41a927db066adbae9cfafb6cacfce3b59bf23058bdaa5f

Aliases

arxiv: 1112.2838 · arxiv_version: 1112.2838v1 · doi: 10.48550/arxiv.1112.2838 · pith_short_12: 7WR55YTC3DWR · pith_short_16: 7WR55YTC3DWRY3CB · pith_short_8: 7WR55YTC

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/7WR55YTC3DWRY3CBVET5WBTK3O \
  | 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: fda3dee262d8ed1c6c41a927db066adbae9cfafb6cacfce3b59bf23058bdaa5f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "513e865b32ece140b30172d5b40fd7121244d354a369e1c0258cbefcab52c146",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2011-12-13T10:08:48Z",
    "title_canon_sha256": "0dbdc975bb9fdbc95b34afe1889bc503e0f3e634369ac82e2eeb04dc1abf66fc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1112.2838",
    "kind": "arxiv",
    "version": 1
  }
}