Pith Number

pith:CPNB2XU6

pith:2011:CPNB2XU6R5BEAQOVIEAPZKZVZH

not attested not anchored not stored refs pending

Extensible Pattern Matching in an Extensible Language

Sam Tobin-Hochstadt

arxiv:1106.2578 v1 · 2011-06-14 · 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{CPNB2XU6R5BEAQOVIEAPZKZVZH}

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	2026-05-18T04:20:05.364533Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

13da1d5e9e8f424041d54100fcab35c9fc41829bc0fa834b8d304d32c020a23d

Aliases

arxiv: 1106.2578 · arxiv_version: 1106.2578v1 · doi: 10.48550/arxiv.1106.2578 · pith_short_12: CPNB2XU6R5BE · pith_short_16: CPNB2XU6R5BEAQOV · pith_short_8: CPNB2XU6

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/CPNB2XU6R5BEAQOVIEAPZKZVZH \
  | 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: 13da1d5e9e8f424041d54100fcab35c9fc41829bc0fa834b8d304d32c020a23d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "968bdb2752418c338cef95af83bdc8f26ad23255f17bb1b0534229dd08d34e3e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2011-06-14T00:06:58Z",
    "title_canon_sha256": "cf4609cd51b00b256d79028c0ca372898fc08e6248be16cf75455dc17c367dd6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.2578",
    "kind": "arxiv",
    "version": 1
  }
}