Pith Number

pith:QI5PLJWD

pith:2015:QI5PLJWDK4ONWNPEBHE5LM5H7F

not attested not anchored not stored refs pending

Some Notes on Finite Sets

Chris Preston

arxiv:1509.02747 v6 · 2015-09-09 · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QI5PLJWDK4ONWNPEBHE5LM5H7F}

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	2026-05-18T00:19:09.195526Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

823af5a6c3571cdb35e409c9d5b3a7f97755080ea03f6577673e35ba85588df8

Aliases

arxiv: 1509.02747 · arxiv_version: 1509.02747v6 · doi: 10.48550/arxiv.1509.02747 · pith_short_12: QI5PLJWDK4ON · pith_short_16: QI5PLJWDK4ONWNPE · pith_short_8: QI5PLJWD

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/QI5PLJWDK4ONWNPEBHE5LM5H7F \
  | 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: 823af5a6c3571cdb35e409c9d5b3a7f97755080ea03f6577673e35ba85588df8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "981a95ebe65d9b275b0d2a238d147e330204c71bd564eb0ca4eb89e6e6412728",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2015-09-09T12:25:07Z",
    "title_canon_sha256": "a926db4ff5ce98e99714cd9c7c0ed73cd275a5285e808b25d6453e0612b045c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.02747",
    "kind": "arxiv",
    "version": 6
  }
}