Pith Number

pith:SOM7YGKR

pith:2010:SOM7YGKR5UXLTL4H4HHCJ27EXO

not attested not anchored not stored refs pending

Evaluating Call-By-Need on the Control Stack

David Van Horn, Matthias Felleisen, Stephen Chang

arxiv:1009.3174 v1 · 2010-09-16 · 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{SOM7YGKR5UXLTL4H4HHCJ27EXO}

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	2026-05-18T04:40:46.837361Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9399fc1951ed2eb9af87e1ce24ebe4bb8391e80cd1a0d0701ede1ead102bbb84

Aliases

arxiv: 1009.3174 · arxiv_version: 1009.3174v1 · doi: 10.48550/arxiv.1009.3174 · pith_short_12: SOM7YGKR5UXL · pith_short_16: SOM7YGKR5UXLTL4H · pith_short_8: SOM7YGKR

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/SOM7YGKR5UXLTL4H4HHCJ27EXO \
  | 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: 9399fc1951ed2eb9af87e1ce24ebe4bb8391e80cd1a0d0701ede1ead102bbb84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3009afae8244c610156a0984c0f41b1677a75253b2893fc0e26f91622323da13",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2010-09-16T13:38:10Z",
    "title_canon_sha256": "92c580674173a45209e51cfe0d712f284eaa86683b409a26cd3112e50df57d56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.3174",
    "kind": "arxiv",
    "version": 1
  }
}