Pith Number

pith:JJQFTUY3

pith:2012:JJQFTUY3IGUGHHIZCXS7R7I7PP

not attested not anchored not stored refs pending

Delay-Doppler Channel Estimation with Almost Linear Complexity

Akbar Sayeed, Alexander Fish, Oded Schwartz, Ronny Hadani, Shamgar Gurevich

arxiv:1208.4405 v2 · 2012-08-22 · cs.IT · math.IT · math.NT · math.RT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JJQFTUY3IGUGHHIZCXS7R7I7PP}

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	2026-05-18T02:21:00.804919Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4a6059d31b41a8639d1915e5f8fd1f7bfbe832ff86f1a29fd22ea63c8e863177

Aliases

arxiv: 1208.4405 · arxiv_version: 1208.4405v2 · doi: 10.48550/arxiv.1208.4405 · pith_short_12: JJQFTUY3IGUG · pith_short_16: JJQFTUY3IGUGHHIZ · pith_short_8: JJQFTUY3

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/JJQFTUY3IGUGHHIZCXS7R7I7PP \
  | 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: 4a6059d31b41a8639d1915e5f8fd1f7bfbe832ff86f1a29fd22ea63c8e863177

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "17f793616c21a6a38c56c98a8a2ad9a84a88fc700c3c25d5ab0b5bcbb652d38b",
    "cross_cats_sorted": [
      "math.IT",
      "math.NT",
      "math.RT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2012-08-22T00:10:18Z",
    "title_canon_sha256": "e79c0a2fb9f3a540401d9588a9cf5d3aec430724b3d53cc02e1a85d8df5256ec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.4405",
    "kind": "arxiv",
    "version": 2
  }
}