Pith Number

pith:YDDTH6YC

pith:2017:YDDTH6YC5DAJSTS5KHOP4OQTHO

not attested not anchored not stored refs pending

On the non-existence of $srg(76,21,2,7)$

Ibrahim O. Sarumi, Monther R. Alfuraidan, Sergey Shpectorov

arxiv:1706.07320 v1 · 2017-06-22 · 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{YDDTH6YC5DAJSTS5KHOP4OQTHO}

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	2026-05-18T00:41:51.976745Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c0c733fb02e8c0994e5d51dcfe3a133b928482ba9997621ad8145f57f51a5599

Aliases

arxiv: 1706.07320 · arxiv_version: 1706.07320v1 · doi: 10.48550/arxiv.1706.07320 · pith_short_12: YDDTH6YC5DAJ · pith_short_16: YDDTH6YC5DAJSTS5 · pith_short_8: YDDTH6YC

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/YDDTH6YC5DAJSTS5KHOP4OQTHO \
  | 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: c0c733fb02e8c0994e5d51dcfe3a133b928482ba9997621ad8145f57f51a5599

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0a9d2d8d68d3472ab2cc55acc49a7367825d2e5ef09a74f14ba1cc3d3082d9a4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2017-06-22T13:46:50Z",
    "title_canon_sha256": "31fe71d69157cdb61578f1190e56e44f845979dcf7a45eb72dfd5285d8861a35"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.07320",
    "kind": "arxiv",
    "version": 1
  }
}