Pith Number

pith:W7IBIZ2F

pith:2018:W7IBIZ2F2SEXUL2W6JPQBOQ7HR

not attested not anchored not stored refs pending

Reachability Analysis of Pushdown Systems with an Upper Stack

Adrien Pommellet, Marcio Diaz, Tayssir Touili

arxiv:1811.02982 v1 · 2018-11-07 · 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{W7IBIZ2F2SEXUL2W6JPQBOQ7HR}

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	2026-05-18T00:01:20.206222Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b7d0146745d4897a2f56f25f00ba1f3c60ccf0da51e48ec238178297382904de

Aliases

arxiv: 1811.02982 · arxiv_version: 1811.02982v1 · doi: 10.48550/arxiv.1811.02982 · pith_short_12: W7IBIZ2F2SEX · pith_short_16: W7IBIZ2F2SEXUL2W · pith_short_8: W7IBIZ2F

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/W7IBIZ2F2SEXUL2W6JPQBOQ7HR \
  | 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: b7d0146745d4897a2f56f25f00ba1f3c60ccf0da51e48ec238178297382904de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a0598547a6e04dc722922b3175af0014ae115f94a16644c04924f68f2d94b16",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2018-11-07T16:50:08Z",
    "title_canon_sha256": "8fa4a5581a4bdf7acd1f5bcc53e60e9f5eb28f62bc74f38176dd96f648d68bfa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.02982",
    "kind": "arxiv",
    "version": 1
  }
}