Pith Number

pith:G633MUNU

pith:2009:G633MUNUOJYCLF456S6V76DFZG

not attested not anchored not stored refs pending

A Step-indexed Semantics of Imperative Objects

Catalin Hritcu, Jan Schwinghammer

arxiv:0906.1350 v2 · 2009-06-07 · cs.PL · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{G633MUNUOJYCLF456S6V76DFZG}

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	2026-05-18T01:37:40.365880Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

37b7b651b4727025979df4bd5ff865c99098c451eeb7986f83dcf34d4f1b735b

Aliases

arxiv: 0906.1350 · arxiv_version: 0906.1350v2 · doi: 10.48550/arxiv.0906.1350 · pith_short_12: G633MUNUOJYC · pith_short_16: G633MUNUOJYCLF45 · pith_short_8: G633MUNU

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/G633MUNUOJYCLF456S6V76DFZG \
  | 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: 37b7b651b4727025979df4bd5ff865c99098c451eeb7986f83dcf34d4f1b735b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67e42ffc4343f97924deaec45289017ae477034d1ec351b131420ed1e705874e",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2009-06-07T11:42:45Z",
    "title_canon_sha256": "74faffef821516ebbdd4d4cf3d0da5ce636cf2b953ce7701ae6ee765153fcc67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.1350",
    "kind": "arxiv",
    "version": 2
  }
}