Pith Number

pith:PP3AJCPY

pith:2019:PP3AJCPY4TC4QEGEZFGNGEGMRL

not attested not anchored not stored refs pending

Parameterized Complexity of Safe Set

Hirotaka Ono, Ioannis Katsikarelis, Michael Lampis, R\'emy Belmonte, Tesshu Hanaka, Yota Otachi

arxiv:1901.09434 v2 · 2019-01-27 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PP3AJCPY4TC4QEGEZFGNGEGMRL}

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	2026-05-17T23:55:02.929601Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bf60489f8e4c5c810c4c94cd310cc8ad81495dbb0bc9fc6e73fdddcfa4db067

Aliases

arxiv: 1901.09434 · arxiv_version: 1901.09434v2 · doi: 10.48550/arxiv.1901.09434 · pith_short_12: PP3AJCPY4TC4 · pith_short_16: PP3AJCPY4TC4QEGE · pith_short_8: PP3AJCPY

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/PP3AJCPY4TC4QEGEZFGNGEGMRL \
  | 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: 7bf60489f8e4c5c810c4c94cd310cc8ad81495dbb0bc9fc6e73fdddcfa4db067

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2a174ccc930b69bf4db6fd44cb4dfecb372e7baf49af5661c073fefdd3233fc9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2019-01-27T20:20:07Z",
    "title_canon_sha256": "6361156787d1e61f9c209cfe1adbee5a26f212e36548d7ddab42ea264fe91a98"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1901.09434",
    "kind": "arxiv",
    "version": 2
  }
}