Pith Number

pith:BN5EXNHK

pith:2014:BN5EXNHKYG7YBTMH7VLOGKB3FY

not attested not anchored not stored refs pending

On the reducibility of exact covering systems

Ofir Schnabel

arxiv:1402.3957 v2 · 2014-02-17 · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BN5EXNHKYG7YBTMH7VLOGKB3FY}

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	2026-05-18T01:59:53.647060Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0b7a4bb4eac1bf80cd87fd56e3283b2e155d4daacf4aa7786a1d58e09e2883ca

Aliases

arxiv: 1402.3957 · arxiv_version: 1402.3957v2 · doi: 10.48550/arxiv.1402.3957 · pith_short_12: BN5EXNHKYG7Y · pith_short_16: BN5EXNHKYG7YBTMH · pith_short_8: BN5EXNHK

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/BN5EXNHKYG7YBTMH7VLOGKB3FY \
  | 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: 0b7a4bb4eac1bf80cd87fd56e3283b2e155d4daacf4aa7786a1d58e09e2883ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "94d79d44896431a032f0b2f5c003615c3dae6c38849359f6affd360f4909a294",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2014-02-17T10:58:23Z",
    "title_canon_sha256": "83aa2f1e4260744c29f38d3079f56114aeb7f1888e1221716e31beca27f61c1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1402.3957",
    "kind": "arxiv",
    "version": 2
  }
}