Pith Number

pith:BSWVG553

pith:2019:BSWVG553D2T7JXO5KDYPV4YVAI

not attested not anchored not stored refs pending

Free Theorems Simply, via Dinaturality

Janis Voigtl\"ander

arxiv:1908.07776 v1 · 2019-08-21 · 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{BSWVG553D2T7JXO5KDYPV4YVAI}

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	2026-07-04T23:59:01.063337Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0cad5377bb1ea7f4dddd50f0faf3150236905d4ce77c95bee17ed617c8171555

Aliases

arxiv: 1908.07776 · arxiv_version: 1908.07776v1 · doi: 10.48550/arxiv.1908.07776 · pith_short_12: BSWVG553D2T7 · pith_short_16: BSWVG553D2T7JXO5 · pith_short_8: BSWVG553

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/BSWVG553D2T7JXO5KDYPV4YVAI \
  | 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: 0cad5377bb1ea7f4dddd50f0faf3150236905d4ce77c95bee17ed617c8171555

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "592073e12e9dbab9ad4b7d057a2b4630658c499298c16c64cac1327526c77b82",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2019-08-21T10:16:16Z",
    "title_canon_sha256": "2528bda2eeca2f506bbc4bc9478de91c25a0addb4bd5f0a187c4a5ee2070a018"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.07776",
    "kind": "arxiv",
    "version": 1
  }
}