Pith Number

pith:UUMDQ4CZ

pith:2011:UUMDQ4CZ3MCGTAU4VET6R5ZKGM

not attested not anchored not stored refs pending

Session Types = Intersection Types + Union Types

Italy), Luca Padovani (Dipartimento di Informatica, Universit\`a di Torino

arxiv:1101.4429 v1 · 2011-01-24 · cs.PL · cs.DC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UUMDQ4CZ3MCGTAU4VET6R5ZKGM}

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	2026-05-18T04:31:11.031307Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a518387059db0469829ca927e8f72a331e7de5afed073335e11eb478437b63fb

Aliases

arxiv: 1101.4429 · arxiv_version: 1101.4429v1 · doi: 10.48550/arxiv.1101.4429 · pith_short_12: UUMDQ4CZ3MCG · pith_short_16: UUMDQ4CZ3MCGTAU4 · pith_short_8: UUMDQ4CZ

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/UUMDQ4CZ3MCGTAU4VET6R5ZKGM \
  | 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: a518387059db0469829ca927e8f72a331e7de5afed073335e11eb478437b63fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ad781e5fdd5fde4cb1c6af23c4ad16d680f85ee5399cbe79b16aa51c0c8a8e2",
    "cross_cats_sorted": [
      "cs.DC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2011-01-24T01:39:52Z",
    "title_canon_sha256": "c3dfac68a1d454156385f95a7b6689f5b651879dce7c82eca76a4095d4d4f239"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1101.4429",
    "kind": "arxiv",
    "version": 1
  }
}