Pith Number

pith:5X4DPSMF

pith:2018:5X4DPSMFXXL2OPJYMLO3FOOXOI

not attested not anchored not stored refs pending

Non-existence of perfect binary sequences

H. Cao, K. Feng, X. Niu

arxiv:1804.03808 v1 · 2018-04-11 · 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{5X4DPSMFXXL2OPJYMLO3FOOXOI}

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	2026-05-18T00:18:43.015401Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

edf837c985bdd7a73d3862ddb2b9d7722f4228fa69d5a2af7648280aff640a62

Aliases

arxiv: 1804.03808 · arxiv_version: 1804.03808v1 · doi: 10.48550/arxiv.1804.03808 · pith_short_12: 5X4DPSMFXXL2 · pith_short_16: 5X4DPSMFXXL2OPJY · pith_short_8: 5X4DPSMF

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/5X4DPSMFXXL2OPJYMLO3FOOXOI \
  | 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: edf837c985bdd7a73d3862ddb2b9d7722f4228fa69d5a2af7648280aff640a62

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f924e0da48e8127af8ce1d04029788482f2e688f6e10c874b0b530007b10edc7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-04-11T04:47:33Z",
    "title_canon_sha256": "d5733e8f136b1f2c10f464726d664e2f61462ae5410cee403eed69d5f71d9741"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.03808",
    "kind": "arxiv",
    "version": 1
  }
}