Pith Number

pith:R2C6ZT2S

pith:2015:R2C6ZT2SX5N4RQDX5UNYBDNNT5

not attested not anchored not stored refs pending

Van Lambalgen's theorem fails for some computable measure

Bruno Bauwens

arxiv:1509.02884 v5 · 2015-09-09 · 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{R2C6ZT2SX5N4RQDX5UNYBDNNT5}

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	2026-05-18T01:19:11.784900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e85eccf52bf5bc8c077ed1b808dad9f74dd6c37a2de24958dbe7fec23567e15

Aliases

arxiv: 1509.02884 · arxiv_version: 1509.02884v5 · doi: 10.48550/arxiv.1509.02884 · pith_short_12: R2C6ZT2SX5N4 · pith_short_16: R2C6ZT2SX5N4RQDX · pith_short_8: R2C6ZT2S

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/R2C6ZT2SX5N4RQDX5UNYBDNNT5 \
  | 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: 8e85eccf52bf5bc8c077ed1b808dad9f74dd6c37a2de24958dbe7fec23567e15

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f703e0ec22187b92bae5c68d8727f1c0102eb6a276fb3449d65403e33008b75f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-09-09T18:51:58Z",
    "title_canon_sha256": "aa0fe411a56c409ba85e0ba72fdc25447fd4ce9a2f0c87b3872cf569dd30fbc2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.02884",
    "kind": "arxiv",
    "version": 5
  }
}