Pith Number

pith:2U2OOF42

pith:2013:2U2OOF42QD6J3NNOLBH5AVSB3Z

not attested not anchored not stored refs pending

Sparse Channel Estimation by Factor Graphs

Christian Jutten, Masoud Babaie-Zadeh, Rad Niazadeh

arxiv:1308.5597 v1 · 2013-08-26 · cs.IT · cs.SY · 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{2U2OOF42QD6J3NNOLBH5AVSB3Z}

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	2026-05-18T03:15:04.020995Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d534e7179a80fc9db5ae584fd05641de650d6c98c074729912698f78213cfc8f

Aliases

arxiv: 1308.5597 · arxiv_version: 1308.5597v1 · doi: 10.48550/arxiv.1308.5597 · pith_short_12: 2U2OOF42QD6J · pith_short_16: 2U2OOF42QD6J3NNO · pith_short_8: 2U2OOF42

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/2U2OOF42QD6J3NNOLBH5AVSB3Z \
  | 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: d534e7179a80fc9db5ae584fd05641de650d6c98c074729912698f78213cfc8f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0250e0031aaacb55ac249e4ff576ce0a4e52d3088dd3841419b8cd0d8cba7c3c",
    "cross_cats_sorted": [
      "cs.SY",
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-08-26T14:26:23Z",
    "title_canon_sha256": "6d93ed1ac5997cf08ef1a2bf15b1f00c186e68e04b0a8ddcd21bb2c48b49151e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.5597",
    "kind": "arxiv",
    "version": 1
  }
}