Pith Number

pith:P7UMC2F5

pith:2017:P7UMC2F5BXZYQGCBRDAA7PJV4D

not attested not anchored not stored refs pending

Soft Contract Verification for Higher-Order Stateful Programs

David Van Horn, Phuc C. Nguyen, Sam Tobin-Hochstadt, Thomas Gilray

arxiv:1711.03620 v1 · 2017-11-09 · 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{P7UMC2F5BXZYQGCBRDAA7PJV4D}

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	2026-05-18T00:30:51.862598Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7fe8c168bd0df388184188c00fbd35e0faf7c1fc79908c9fbddd7b77dc32a6b0

Aliases

arxiv: 1711.03620 · arxiv_version: 1711.03620v1 · doi: 10.48550/arxiv.1711.03620 · pith_short_12: P7UMC2F5BXZY · pith_short_16: P7UMC2F5BXZYQGCB · pith_short_8: P7UMC2F5

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/P7UMC2F5BXZYQGCBRDAA7PJV4D \
  | 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: 7fe8c168bd0df388184188c00fbd35e0faf7c1fc79908c9fbddd7b77dc32a6b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "526dbbc24fb9a0d43d82fdbcd6bd643532026065bcd7349394610530494b5307",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2017-11-09T22:05:47Z",
    "title_canon_sha256": "57d1d95f9ae9272b3e9190e92041d1d4d263cb5c4936c59f10ca395ff7cd4130"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.03620",
    "kind": "arxiv",
    "version": 1
  }
}