Pith Number

pith:4HMFX66P

pith:2014:4HMFX66PRWEX2FKYULWBRCQ6VE

not attested not anchored not stored refs pending

Branching Bisimilarity of Normed BPA Processes is in NEXPTIME

Petr Jan\v{c}ar, Wojciech Czerwi\'nski

arxiv:1407.0645 v2 · 2014-07-02 · cs.LO · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4HMFX66PRWEX2FKYULWBRCQ6VE}

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	2026-05-18T01:24:08.858111Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e1d85bfbcf8d897d1558a2ec188a1ea915ee9c15ca832b59f0de7de21bb5dcea

Aliases

arxiv: 1407.0645 · arxiv_version: 1407.0645v2 · doi: 10.48550/arxiv.1407.0645 · pith_short_12: 4HMFX66PRWEX · pith_short_16: 4HMFX66PRWEX2FKY · pith_short_8: 4HMFX66P

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/4HMFX66PRWEX2FKYULWBRCQ6VE \
  | 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: e1d85bfbcf8d897d1558a2ec188a1ea915ee9c15ca832b59f0de7de21bb5dcea

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e77be5a4cad9bc857d51140f5ca0fce5c81a5f3dceb64d19ff59020e0f9e5125",
    "cross_cats_sorted": [
      "cs.FL"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2014-07-02T16:53:04Z",
    "title_canon_sha256": "5616a238cadbcd0e7fb9f1bbfec86c21ff7ef1188cd4fff87294ab455eca8a8f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.0645",
    "kind": "arxiv",
    "version": 2
  }
}