Pith Number

pith:73IXDXA6

pith:2017:73IXDXA6EVEAZTX2VP5DI332LA

not attested not anchored not stored refs pending

Converse Theorems for Safety and Barrier Certificates

Stefan Ratschan

arxiv:1701.03948 v5 · 2017-01-14 · cs.SY

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{73IXDXA6EVEAZTX2VP5DI332LA}

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	2026-05-18T00:09:10.191874Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fed171dc1e25480ccefaabfa346f7a58184a132f9fdbc3bd59346a5a48b4c637

Aliases

arxiv: 1701.03948 · arxiv_version: 1701.03948v5 · doi: 10.48550/arxiv.1701.03948 · pith_short_12: 73IXDXA6EVEA · pith_short_16: 73IXDXA6EVEAZTX2 · pith_short_8: 73IXDXA6

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/73IXDXA6EVEAZTX2VP5DI332LA \
  | 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: fed171dc1e25480ccefaabfa346f7a58184a132f9fdbc3bd59346a5a48b4c637

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b76b9452ab805bbfcea0d542f1df6ce46d58d23e1c3c865fd6d0fdb688d5d805",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SY",
    "submitted_at": "2017-01-14T16:49:00Z",
    "title_canon_sha256": "be1e9f03c28ff280392eaa3d2c617147fae3fdf35c09ac251e265ba61e83732b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1701.03948",
    "kind": "arxiv",
    "version": 5
  }
}