Pith Number

pith:4UUWIX5M

pith:2017:4UUWIX5MTVY33VCW3H2KLSWI54

not attested not anchored not stored refs pending

Joins in the strong Weihrauch degrees

Damir Dzhafarov

arxiv:1704.01494 v1 · 2017-04-05 · math.LO · cs.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{4UUWIX5MTVY33VCW3H2KLSWI54}

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	2026-05-18T00:46:56.316292Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e529645fac9d71bdd456d9f4a5cac8ef1be6dddac4db11a27178cf91f12acaf0

Aliases

arxiv: 1704.01494 · arxiv_version: 1704.01494v1 · doi: 10.48550/arxiv.1704.01494 · pith_short_12: 4UUWIX5MTVY3 · pith_short_16: 4UUWIX5MTVY33VCW · pith_short_8: 4UUWIX5M

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/4UUWIX5MTVY33VCW3H2KLSWI54 \
  | 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: e529645fac9d71bdd456d9f4a5cac8ef1be6dddac4db11a27178cf91f12acaf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "397d1a2134c322e87727735c3107a53f7d61f9b3cf1ba54a8ca070740245ff0c",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2017-04-05T15:38:53Z",
    "title_canon_sha256": "5b3bdb20f4895f33405c9d0a7dcec724a6a7cd3c3796cb68732ed51b902ba28d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.01494",
    "kind": "arxiv",
    "version": 1
  }
}