Pith Number

pith:6VLDSD5K

pith:2011:6VLDSD5KO5L5D6RDQO3OWG6A7D

not attested not anchored not stored refs pending

A new graphical calculus of proofs

Ian Mackie (Ecole Polytechnique), Maribel Fern\'andez (King's College London), Sandra Alves (University of Porto)

arxiv:1102.2655 v1 · 2011-02-14 · 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{6VLDSD5KO5L5D6RDQO3OWG6A7D}

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	2026-05-18T04:28:46.806519Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f556390faa7757d1fa2383b6eb1bc0f8eb17b105dd1537df40cd6b9faa8a8762

Aliases

arxiv: 1102.2655 · arxiv_version: 1102.2655v1 · doi: 10.48550/arxiv.1102.2655 · pith_short_12: 6VLDSD5KO5L5 · pith_short_16: 6VLDSD5KO5L5D6RD · pith_short_8: 6VLDSD5K

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/6VLDSD5KO5L5D6RDQO3OWG6A7D \
  | 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: f556390faa7757d1fa2383b6eb1bc0f8eb17b105dd1537df40cd6b9faa8a8762

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "63e09a4a86cac5ac3c4398caecf7232c36e007b9635b87f54887364b7da26498",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2011-02-14T01:09:45Z",
    "title_canon_sha256": "7a50fcfd3108e73f6f5f867ba582818ea492b4c0092b34a9111a11e99f00c6a5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.2655",
    "kind": "arxiv",
    "version": 1
  }
}