Pith Number

pith:DUFR4VYF

pith:2015:DUFR4VYFGCIN6DLEONHDBX7HCV

not attested not anchored not stored refs pending

Propositional Calculus in Coq

Floris van Doorn

arxiv:1503.08744 v2 · 2015-03-30 · 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{DUFR4VYFGCIN6DLEONHDBX7HCV}

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	2026-05-18T02:19:52.137684Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d0b1e57053090df0d64734e30dfe7155a28f13e8270859a7f930907e12fb9f6

Aliases

arxiv: 1503.08744 · arxiv_version: 1503.08744v2 · doi: 10.48550/arxiv.1503.08744 · pith_short_12: DUFR4VYFGCIN · pith_short_16: DUFR4VYFGCIN6DLE · pith_short_8: DUFR4VYF

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/DUFR4VYFGCIN6DLEONHDBX7HCV \
  | 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: 1d0b1e57053090df0d64734e30dfe7155a28f13e8270859a7f930907e12fb9f6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3f6708b02b579a49efbfa8b58a6d9a5ee92239e7ae16c8b8ca5a0c8b899138e4",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://creativecommons.org/licenses/by/3.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2015-03-30T17:07:58Z",
    "title_canon_sha256": "9fa5efe233984180bc7c85b8d1efaa2c34351985afda760a5c04b2dc117cc953"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1503.08744",
    "kind": "arxiv",
    "version": 2
  }
}