Pith Number

pith:3KDVSVDQ

pith:2003:3KDVSVDQWNIM7WZKNVJLAIIOGG

not attested not anchored not stored refs pending

Reachability problems for communicating finite state machines

Jan Pachl

arxiv:cs/0306121 v2 · 2003-06-22 · cs.LO · cs.NI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3KDVSVDQWNIM7WZKNVJLAIIOGG}

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	2026-05-18T03:59:38.819374Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da87595470b350cfdb2a6d52b0210e318703c331f2c15fc133da253860ad3c35

Aliases

arxiv: cs/0306121 · arxiv_version: cs/0306121v2 · doi: 10.48550/arxiv.cs/0306121 · pith_short_12: 3KDVSVDQWNIM · pith_short_16: 3KDVSVDQWNIM7WZK · pith_short_8: 3KDVSVDQ

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/3KDVSVDQWNIM7WZKNVJLAIIOGG \
  | 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: da87595470b350cfdb2a6d52b0210e318703c331f2c15fc133da253860ad3c35

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "33aaeffec616c2d27fb23737a25043f1abdc5b1f19a7fc89580761526bd23854",
    "cross_cats_sorted": [
      "cs.NI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2003-06-22T19:18:55Z",
    "title_canon_sha256": "fc3d7c641199bc9ce05e137bcb9f5f92514c92128a250442b8f2e18228072d89"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0306121",
    "kind": "arxiv",
    "version": 2
  }
}