Pith Number

pith:4QIU2Q4S

pith:2016:4QIU2Q4SUTGIYCFIDGKVLUXHNH

not attested not anchored not stored refs pending

Incrementally Closing Octagons

Andy King, Aziem Chawdhary, Ed Robbins

arxiv:1610.02952 v2 · 2016-10-10 · cs.PL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4QIU2Q4SUTGIYCFIDGKVLUXHNH}

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	2026-05-18T00:31:42.016757Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e4114d4392a4cc8c08a8199555d2e769f16d0c7deb939733eed208dc7f7cf788

Aliases

arxiv: 1610.02952 · arxiv_version: 1610.02952v2 · doi: 10.48550/arxiv.1610.02952 · pith_short_12: 4QIU2Q4SUTGI · pith_short_16: 4QIU2Q4SUTGIYCFI · pith_short_8: 4QIU2Q4S

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/4QIU2Q4SUTGIYCFIDGKVLUXHNH \
  | 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: e4114d4392a4cc8c08a8199555d2e769f16d0c7deb939733eed208dc7f7cf788

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3b5f1eca2cde2af41b1b7cf4015c0b65a4035cd54d02f5920686ad6bc9eeccf1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2016-10-10T15:10:01Z",
    "title_canon_sha256": "592f5ab4066242caabc2db1a24247b8aea1e5febdd53520791e5dbe6c3a8a940"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1610.02952",
    "kind": "arxiv",
    "version": 2
  }
}