Pith Number

pith:SDL4OPYI

pith:2019:SDL4OPYISI5F5YA5OOPYIZFQCC

not attested not anchored not stored refs pending

Augmenting Type Signatures for Program Synthesis

Bruce Collie, Michael O'Boyle

arxiv:1907.05649 v1 · 2019-07-12 · 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{SDL4OPYISI5F5YA5OOPYIZFQCC}

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	2026-05-17T23:40:47.425956Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

90d7c73f08923a5ee01d739f8464b010b334eef2e600b1a01a4b0e4e0df5f2dc

Aliases

arxiv: 1907.05649 · arxiv_version: 1907.05649v1 · doi: 10.48550/arxiv.1907.05649 · pith_short_12: SDL4OPYISI5F · pith_short_16: SDL4OPYISI5F5YA5 · pith_short_8: SDL4OPYI

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/SDL4OPYISI5F5YA5OOPYIZFQCC \
  | 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: 90d7c73f08923a5ee01d739f8464b010b334eef2e600b1a01a4b0e4e0df5f2dc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b227e55323f9831298a80da400953ed3e76115654469c54d401f56a3b947f7f0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2019-07-12T09:53:03Z",
    "title_canon_sha256": "16e0586bb859725cbcd79f4e0b810107bdbce58c601c384ad78c9be8440703aa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.05649",
    "kind": "arxiv",
    "version": 1
  }
}