Pith Number

pith:C2RDVBUR

pith:2019:C2RDVBURLYZWSANWQKFEK36GF7

not attested not anchored not stored refs pending

Relationships between computability-theoretic properties of problems

Dan Turetsky, Ludovic Patey, Matthew Harrison-Trainor, Noam Greenberg, Rod Downey

arxiv:1903.04273 v1 · 2019-03-11 · 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{C2RDVBURLYZWSANWQKFEK36GF7}

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	2026-05-17T23:51:35.953614Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16a23a86915e336901b6828a456fc62ffa7893c41af70122b8d39734034cfd61

Aliases

arxiv: 1903.04273 · arxiv_version: 1903.04273v1 · doi: 10.48550/arxiv.1903.04273 · pith_short_12: C2RDVBURLYZW · pith_short_16: C2RDVBURLYZWSANW · pith_short_8: C2RDVBUR

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/C2RDVBURLYZWSANWQKFEK36GF7 \
  | 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: 16a23a86915e336901b6828a456fc62ffa7893c41af70122b8d39734034cfd61

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4710a66dd2cffef1da44519f6e05d3597918073e628d2c006e4846d433f5bd7a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2019-03-11T13:07:39Z",
    "title_canon_sha256": "6604405ef69d969e1e0f7f737398ccc6d3186d8f6ffde5b447881f8f94752410"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.04273",
    "kind": "arxiv",
    "version": 1
  }
}