Pith Number

pith:EJK4SPQI

pith:2012:EJK4SPQISOJDT5U5UFRJ7VUL5O

not attested not anchored not stored refs pending

Grammar Logics in Nested Sequent Calculus: Proof Theory and Decision Procedures

Alwen Tiu, Egor Ianovski, Rajeev Gore

arxiv:1204.2413 v1 · 2012-04-11 · cs.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EJK4SPQISOJDT5U5UFRJ7VUL5O}

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	2026-05-18T03:58:05.369064Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2255c93e08939239f69da1629fd68beb917dd874d2b034a97dc1d5ec50117142

Aliases

arxiv: 1204.2413 · arxiv_version: 1204.2413v1 · doi: 10.48550/arxiv.1204.2413 · pith_short_12: EJK4SPQISOJD · pith_short_16: EJK4SPQISOJDT5U5 · pith_short_8: EJK4SPQI

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/EJK4SPQISOJDT5U5UFRJ7VUL5O \
  | 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: 2255c93e08939239f69da1629fd68beb917dd874d2b034a97dc1d5ec50117142

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8f74acaa20ed1a80765bbdc1dbae7d4fa0729d69ab174521d7ff2aa9fb85da6f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2012-04-11T11:11:43Z",
    "title_canon_sha256": "84b7a79bb41426ab2415b63b1312722bb10dea6c037ea03ac6901141a888ab03"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2413",
    "kind": "arxiv",
    "version": 1
  }
}