Pith Number

pith:YMHUPYZS

pith:2012:YMHUPYZSDMAO4FP64RTTNLTZB2

not attested not anchored not stored refs pending

On optimality of designs with three distinct eigenvalues

E. Ghorbani, G. B. Khosrovshahi, M. R. Faghihi, S. Tat

arxiv:1205.5876 v3 · 2012-05-26 · 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{YMHUPYZSDMAO4FP64RTTNLTZB2}

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	2026-05-18T03:28:06.064211Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c30f47e3321b00ee15fee46736ae790e96e51f1c8d48cc3a67ff6f353b12701d

Aliases

arxiv: 1205.5876 · arxiv_version: 1205.5876v3 · doi: 10.48550/arxiv.1205.5876 · pith_short_12: YMHUPYZSDMAO · pith_short_16: YMHUPYZSDMAO4FP6 · pith_short_8: YMHUPYZS

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/YMHUPYZSDMAO4FP64RTTNLTZB2 \
  | 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: c30f47e3321b00ee15fee46736ae790e96e51f1c8d48cc3a67ff6f353b12701d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5cabe239fb309f206f147a19dcdaf281604080fb9c71e75ee1934eaffee07dcb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CO",
    "submitted_at": "2012-05-26T11:47:43Z",
    "title_canon_sha256": "0fa39564c7a8e8707af26d2df56666cc5d81757a833a86a3afbd7031a9fb7a1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.5876",
    "kind": "arxiv",
    "version": 3
  }
}