Pith Number

pith:XE3Y2V76

pith:2015:XE3Y2V76Z3BYA6DYWVRHWXQZRC

not attested not anchored not stored refs pending

On Weihrauch Reducibility and Intuitionistic Reverse Mathematics

Rutger Kuyper

arxiv:1511.05189 v1 · 2015-11-16 · 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{XE3Y2V76Z3BYA6DYWVRHWXQZRC}

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	2026-05-18T01:26:49.830611Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9378d57fecec3807878b5627b5e19888184f0357b76bbcdd23ba3121bd8e75e

Aliases

arxiv: 1511.05189 · arxiv_version: 1511.05189v1 · doi: 10.48550/arxiv.1511.05189 · pith_short_12: XE3Y2V76Z3BY · pith_short_16: XE3Y2V76Z3BYA6DY · pith_short_8: XE3Y2V76

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/XE3Y2V76Z3BYA6DYWVRHWXQZRC \
  | 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: b9378d57fecec3807878b5627b5e19888184f0357b76bbcdd23ba3121bd8e75e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e7c2c0ae15db51d2ab9e529bc408f370d30bacfaa3065b8d788ed7ecd6d07d84",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-11-16T21:39:36Z",
    "title_canon_sha256": "4cbfba4ce49c47fb9f9112df70ca596148db59f0f772f1b2deb2e195bdfd366f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.05189",
    "kind": "arxiv",
    "version": 1
  }
}