Pith Number

pith:DCBPZIXQ

pith:2018:DCBPZIXQM4QFIKKTJG264J7PGF

not attested not anchored not stored refs pending

Using symbolic computation to prove nonexistence of distance-regular graphs

Jano\v{s} Vidali

arxiv:1803.10797 v2 · 2018-03-28 · 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{DCBPZIXQM4QFIKKTJG264J7PGF}

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	2026-05-18T00:02:49.506205Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1882fca2f0672054295349b5ee27ef316954a1aafc54eaa12145bf04157cfbe6

Aliases

arxiv: 1803.10797 · arxiv_version: 1803.10797v2 · doi: 10.48550/arxiv.1803.10797 · pith_short_12: DCBPZIXQM4QF · pith_short_16: DCBPZIXQM4QFIKKT · pith_short_8: DCBPZIXQ

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/DCBPZIXQM4QFIKKTJG264J7PGF \
  | 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: 1882fca2f0672054295349b5ee27ef316954a1aafc54eaa12145bf04157cfbe6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9af209241482ceb0a0ac45d45c4c6130a7ffd4a5a79ffa942f2c25b56d3531e5",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2018-03-28T18:40:59Z",
    "title_canon_sha256": "80c9090a7e6cfd06cccf40b54b7f3b61c7caa7c591e6b94b3584c01e938cdbba"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.10797",
    "kind": "arxiv",
    "version": 2
  }
}