Pith Number

pith:B4442PAK

pith:2007:B4442PAKDXSDNY3BVTDXHHJIJB

not attested not anchored not stored refs pending

MMSE Optimal Algebraic Space-Time Codes

B. Sundar Rajan, G. Susinder Rajan

arxiv:cs/0702008 v2 · 2007-02-01 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{B4442PAKDXSDNY3BVTDXHHJIJB}

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	2026-05-18T00:58:56.177728Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f39cd3c0a1de436e361acc7739d284851a0c0d8a480f5784c0e89655ca7a369

Aliases

arxiv: cs/0702008 · arxiv_version: cs/0702008v2 · doi: 10.48550/arxiv.cs/0702008 · pith_short_12: B4442PAKDXSD · pith_short_16: B4442PAKDXSDNY3B · pith_short_8: B4442PAK

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/B4442PAKDXSDNY3BVTDXHHJIJB \
  | 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: 0f39cd3c0a1de436e361acc7739d284851a0c0d8a480f5784c0e89655ca7a369

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ecd99e0aec328c5a30b9a68abe6b9f033f5e4d4614ac121076bf6834781a1da8",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "",
    "primary_cat": "cs.IT",
    "submitted_at": "2007-02-01T13:43:24Z",
    "title_canon_sha256": "e51a99a93285e471482280f101433dd62a654ef6ade3215d0c4de94f18c7e551"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0702008",
    "kind": "arxiv",
    "version": 2
  }
}