Pith Number

pith:FBSRHE7H

pith:2010:FBSRHE7HI7RU2L6C74XVFGDOYU

not attested not anchored not stored refs pending

First-Order Logical Duality

Henrik Forssell, Steve Awodey

arxiv:1008.3145 v2 · 2010-08-18 · math.LO · math.CT

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FBSRHE7HI7RU2L6C74XVFGDOYU}

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	2026-05-18T03:19:44.285791Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28651393e747e34d2fc2ff2f52986ec524be02fdf35757237b4c54b3c5096896

Aliases

arxiv: 1008.3145 · arxiv_version: 1008.3145v2 · doi: 10.48550/arxiv.1008.3145 · pith_short_12: FBSRHE7HI7RU · pith_short_16: FBSRHE7HI7RU2L6C · pith_short_8: FBSRHE7H

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/FBSRHE7HI7RU2L6C74XVFGDOYU \
  | 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: 28651393e747e34d2fc2ff2f52986ec524be02fdf35757237b4c54b3c5096896

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22b97dd4966a9c2fd8a71769748e10551ae83364f2d84837783d20faa67f2bec",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2010-08-18T18:28:16Z",
    "title_canon_sha256": "9eb81d8869e38ab10a95caaa4ce07ae3766d35a2dc1818887aec0ca7f53a6ced"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.3145",
    "kind": "arxiv",
    "version": 2
  }
}