Pith Number

pith:NSP3WWHU

pith:2019:NSP3WWHUFA7VI5COIM26ZVQBC6

not attested not anchored not stored refs pending

Bidirectional Typing

Jana Dunfield, Neel Krishnaswami

arxiv:1908.05839 v2 · 2019-08-16 · 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{NSP3WWHUFA7VI5COIM26ZVQBC6}

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	2026-07-05T04:06:12.628082Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6c9fbb58f4283f54744e4335ecd6011799e9907748e55a761c0fccda34c94bd6

Aliases

arxiv: 1908.05839 · arxiv_version: 1908.05839v2 · doi: 10.48550/arxiv.1908.05839 · pith_short_12: NSP3WWHUFA7V · pith_short_16: NSP3WWHUFA7VI5CO · pith_short_8: NSP3WWHU

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/NSP3WWHUFA7VI5COIM26ZVQBC6 \
  | 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: 6c9fbb58f4283f54744e4335ecd6011799e9907748e55a761c0fccda34c94bd6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79786813b8947d4b67037193b8c7b10c829bf35b5d88dc31cfb820a4236e8aa5",
    "cross_cats_sorted": [
      "cs.LO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2019-08-16T04:22:23Z",
    "title_canon_sha256": "ef0559782656467a7e3169670e93f4d2802d0c3b3833aa5f13bf3202ce0fc5d8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.05839",
    "kind": "arxiv",
    "version": 2
  }
}