Pith Number

pith:IAUNVDSD

pith:2009:IAUNVDSDKCFXRP77I6UUXOXU3C

not attested not anchored not stored refs pending

A Channel Coding Perspective of Collaborative Filtering

Bikash Kumar Dey, Onkar Dabeer, S. T. Aditya

arxiv:0908.2494 v1 · 2009-08-18 · 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{IAUNVDSDKCFXRP77I6UUXOXU3C}

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	2026-05-18T00:58:19.989009Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4028da8e43508b78bfff47a94bbaf4d89cc8047324169791e768303a596a672b

Aliases

arxiv: 0908.2494 · arxiv_version: 0908.2494v1 · doi: 10.48550/arxiv.0908.2494 · pith_short_12: IAUNVDSDKCFX · pith_short_16: IAUNVDSDKCFXRP77 · pith_short_8: IAUNVDSD

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/IAUNVDSDKCFXRP77I6UUXOXU3C \
  | 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: 4028da8e43508b78bfff47a94bbaf4d89cc8047324169791e768303a596a672b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "91a0d6c68ab6a8413983f280d9756f4a7c600a4029eae04026f0211eb0c0408d",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2009-08-18T06:24:17Z",
    "title_canon_sha256": "1bc441d129c421561b0fd02480d9ac7b3260d5e57a1f8ee38bd2452bd2243f94"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0908.2494",
    "kind": "arxiv",
    "version": 1
  }
}