Pith Number

pith:C5HWRRIV

pith:2019:C5HWRRIV66MGOAD363WSJNXRRC

not attested not anchored not stored refs pending

Proving Unrealizability for Syntax-Guided Synthesis

Jason Breck, John Cyphert, Loris D'Antoni, Qinheping Hu, Thomas Reps

arxiv:1905.05800 v3 · 2019-05-14 · 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{C5HWRRIV66MGOAD363WSJNXRRC}

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	2026-05-17T23:39:39.486834Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

174f68c515f79867007bf6ed24b6f188aced4defc229f8ac549b0540e6856266

Aliases

arxiv: 1905.05800 · arxiv_version: 1905.05800v3 · doi: 10.48550/arxiv.1905.05800 · pith_short_12: C5HWRRIV66MG · pith_short_16: C5HWRRIV66MGOAD3 · pith_short_8: C5HWRRIV

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/C5HWRRIV66MGOAD363WSJNXRRC \
  | 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: 174f68c515f79867007bf6ed24b6f188aced4defc229f8ac549b0540e6856266

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "36a3cfcdb7dc8eca208147a7a47b96e1b44a9f2ed25e05d3be67a739d2606c5b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2019-05-14T19:18:54Z",
    "title_canon_sha256": "f2d126d7728242b0ceba8f96a56fe6308c5a0ae3a02a8860c6f3447be2f260d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.05800",
    "kind": "arxiv",
    "version": 3
  }
}