Pith Number

pith:BPPRLJZO

pith:2014:BPPRLJZO3AD62DMJOFBNIKTRLI

not attested not anchored not stored refs pending

On the complexity of deciding whether the regular number is at most two

Ali Dehghan, Arash Ahadi, Mohammad-Reza Sadeghi

arxiv:1403.1182 v1 · 2014-03-05 · math.CO · 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{BPPRLJZO3AD62DMJOFBNIKTRLI}

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	2026-05-18T02:50:22.670831Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0bdf15a72ed807ed0d897142d42a715a1a442c770520433e6317df7379b743d4

Aliases

arxiv: 1403.1182 · arxiv_version: 1403.1182v1 · doi: 10.48550/arxiv.1403.1182 · pith_short_12: BPPRLJZO3AD6 · pith_short_16: BPPRLJZO3AD62DMJ · pith_short_8: BPPRLJZO

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/BPPRLJZO3AD62DMJOFBNIKTRLI \
  | 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: 0bdf15a72ed807ed0d897142d42a715a1a442c770520433e6317df7379b743d4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a401ffffa416a5f677631f9c3a0ccb9f42c59afb08a9e7031978bca9d4cdbaf5",
    "cross_cats_sorted": [
      "cs.CC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-03-05T16:33:57Z",
    "title_canon_sha256": "151bc5367d84e1a9c3244274720c8b4033f55a66556fd0c2e9d2cac5d4e117b0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.1182",
    "kind": "arxiv",
    "version": 1
  }
}