Pith Number

pith:U4OA2GIV

pith:2013:U4OA2GIVCQJH5MQP6ZSIUNHOAK

not attested not anchored not stored refs pending

A New Statement for Selection and Exception Handling in Imperative Languages

Keehang Kwon

arxiv:1308.4452 v4 · 2013-08-21 · 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{U4OA2GIVCQJH5MQP6ZSIUNHOAK}

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	2026-05-17T23:56:34.712378Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a71c0d191514127eb20ff6648a34ee02ae9f31d19bcd8ed45f67caa3f3937289

Aliases

arxiv: 1308.4452 · arxiv_version: 1308.4452v4 · doi: 10.48550/arxiv.1308.4452 · pith_short_12: U4OA2GIVCQJH · pith_short_16: U4OA2GIVCQJH5MQP · pith_short_8: U4OA2GIV

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/U4OA2GIVCQJH5MQP6ZSIUNHOAK \
  | 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: a71c0d191514127eb20ff6648a34ee02ae9f31d19bcd8ed45f67caa3f3937289

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a7fbe7a25f381aec4c2a36e78c69abba32fd6f4ad0fe77dcfe90e2d97ee2bb0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2013-08-21T00:13:32Z",
    "title_canon_sha256": "773dbaa11eaf84830a8bcf6bd4af6e50c4fa1c5a8676ae295b14ad9125057276"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.4452",
    "kind": "arxiv",
    "version": 4
  }
}