Pith Number

pith:VU7DK2NE

pith:2014:VU7DK2NETXVKX6HDQNRDMWFINM

not attested not anchored not stored refs pending

Comparing the strength of diagonally non-recursive functions in the absence of $\Sigma^0_2$ induction

Fran\c{c}ois G. Dorais, Jeffry L. Hirst, Paul Shafer

arxiv:1401.3823 v2 · 2014-01-16 · 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{VU7DK2NETXVKX6HDQNRDMWFINM}

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	2026-05-18T02:27:29.420265Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ad3e3569a49deaabf8e383623658a86b15a08e9025b8756382525c76a21fc051

Aliases

arxiv: 1401.3823 · arxiv_version: 1401.3823v2 · doi: 10.48550/arxiv.1401.3823 · pith_short_12: VU7DK2NETXVK · pith_short_16: VU7DK2NETXVKX6HD · pith_short_8: VU7DK2NE

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/VU7DK2NETXVKX6HDQNRDMWFINM \
  | 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: ad3e3569a49deaabf8e383623658a86b15a08e9025b8756382525c76a21fc051

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e2133bc1808f9371ce4e01783ed02bfbfdc675de8495746693f21e1c6e20a005",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2014-01-16T03:51:05Z",
    "title_canon_sha256": "6078110c32000ba513e33f66e620a15165c89984e72a73912e92aa00ad5879a4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.3823",
    "kind": "arxiv",
    "version": 2
  }
}