Pith Number

pith:COP6W3UC

pith:2013:COP6W3UCFP5SVGD4PJA7NWCG3K

not attested not anchored not stored refs pending

A Witness Extraction Technique by Proof Normalization Based on Interactive Realizability

Giovanni Birolo

arxiv:1305.3388 v1 · 2013-05-15 · 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{COP6W3UCFP5SVGD4PJA7NWCG3K}

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	2026-05-18T03:25:35.962167Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

139feb6e822bfb2a987c7a41f6d846da94bdc2ece57c8cc286eb97d2d58c027e

Aliases

arxiv: 1305.3388 · arxiv_version: 1305.3388v1 · doi: 10.48550/arxiv.1305.3388 · pith_short_12: COP6W3UCFP5S · pith_short_16: COP6W3UCFP5SVGD4 · pith_short_8: COP6W3UC

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/COP6W3UCFP5SVGD4PJA7NWCG3K \
  | 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: 139feb6e822bfb2a987c7a41f6d846da94bdc2ece57c8cc286eb97d2d58c027e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "232cb7ca2047928886dfd1b1aa4ed92aa3158e2d6111faff1c4d452c09124d01",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2013-05-15T08:31:16Z",
    "title_canon_sha256": "db882338feb7f95f7053f96c6119215cd934f0160b2cf8ba3b091b7afe1a9945"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.3388",
    "kind": "arxiv",
    "version": 1
  }
}