Pith Number

pith:SQLZMIWZ

pith:2013:SQLZMIWZG7BQJEYQ7XT25Q7WLU

not attested not anchored not stored refs pending

Topological Subset Space Models for Public Announcements

Adam Bjorndahl

arxiv:1302.4009 v2 · 2013-02-16 · 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{SQLZMIWZG7BQJEYQ7XT25Q7WLU}

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	2026-05-18T00:55:39.702091Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

94179622d937c3049310fde7aec3f65d1faff8f3b415d3d1b079c0a25d65a748

Aliases

arxiv: 1302.4009 · arxiv_version: 1302.4009v2 · doi: 10.48550/arxiv.1302.4009 · pith_short_12: SQLZMIWZG7BQ · pith_short_16: SQLZMIWZG7BQJEYQ · pith_short_8: SQLZMIWZ

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/SQLZMIWZG7BQJEYQ7XT25Q7WLU \
  | 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: 94179622d937c3049310fde7aec3f65d1faff8f3b415d3d1b079c0a25d65a748

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c94fee8ef079b02ccf0438ad5c4e2c98061a635507afebdb469a6e83d4058087",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2013-02-16T22:42:23Z",
    "title_canon_sha256": "b8a241d7d6da8dc42c2b81bc4454cbe78fd525e237a183b46861253c1dbdd6f6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.4009",
    "kind": "arxiv",
    "version": 2
  }
}