Pith Number

pith:7Q2LUZ77

pith:2008:7Q2LUZ77CJG33L4K6BEVSWPP3A

not attested not anchored not stored refs pending

Eigenvalue Estimates and Mutual Information for the Linear Time-Varying Channel

Brendan Farrell, Thomas Strohmer

arxiv:0802.4330 v2 · 2008-02-29 · 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{7Q2LUZ77CJG33L4K6BEVSWPP3A}

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	2026-05-18T00:58:25.702825Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc34ba67ff124dbdaf8af0495959efd812da93bc5449f8d0f366de78bac5cdbd

Aliases

arxiv: 0802.4330 · arxiv_version: 0802.4330v2 · doi: 10.48550/arxiv.0802.4330 · pith_short_12: 7Q2LUZ77CJG3 · pith_short_16: 7Q2LUZ77CJG33L4K · pith_short_8: 7Q2LUZ77

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/7Q2LUZ77CJG33L4K6BEVSWPP3A \
  | 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: fc34ba67ff124dbdaf8af0495959efd812da93bc5449f8d0f366de78bac5cdbd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9834effe94c3b36631adea4d1d505ca040904785719970b0750d3ab85fe01794",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2008-02-29T06:48:12Z",
    "title_canon_sha256": "fb0e698ceb28528bc1007b83f3ed6c661480781c1da9964223f4e92bb930b00a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.4330",
    "kind": "arxiv",
    "version": 2
  }
}