Pith Number

pith:MNDEDPH2

pith:2008:MNDEDPH2BH4AZ7JFPL655H5P37

not attested not anchored not stored refs pending

When is there a representer theorem? Vector versus matrix regularizers

Andreas Argyriou, Charles Micchelli, Massimiliano Pontil

arxiv:0809.1590 v1 · 2008-09-09 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MNDEDPH2BH4AZ7JFPL655H5P37}

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	2026-05-18T03:48:34.650233Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

634641bcfa09f80cfd257afdde9fafdff8c097d08c5d0ee5b7168790b4c4f7b7

Aliases

arxiv: 0809.1590 · arxiv_version: 0809.1590v1 · doi: 10.48550/arxiv.0809.1590 · pith_short_12: MNDEDPH2BH4A · pith_short_16: MNDEDPH2BH4AZ7JF · pith_short_8: MNDEDPH2

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/MNDEDPH2BH4AZ7JFPL655H5P37 \
  | 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: 634641bcfa09f80cfd257afdde9fafdff8c097d08c5d0ee5b7168790b4c4f7b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "efe0c215479ece903dcedbc80b64d3b5a3a73a946839c4aeb2f33f63ef81c5fa",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2008-09-09T16:11:12Z",
    "title_canon_sha256": "8c8baec85872233255c47a0bbd6092b1f5a3f4985c55afeafda89b9e4bbcb67b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.1590",
    "kind": "arxiv",
    "version": 1
  }
}