Pith Number

pith:NFWIK3IF

pith:2013:NFWIK3IFAXWOCJJPQWEGHISMGO

not attested not anchored not stored refs pending

On the Nuclear Norm and the Singular Value Decomposition of Tensors

Harm Derksen

arxiv:1308.3860 v2 · 2013-08-18 · math.OC · cs.NA · math.NA · math.SP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NFWIK3IFAXWOCJJPQWEGHISMGO}

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	2026-05-18T02:53:41.223440Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

696c856d0505ece1252f858863a24c33b5b5f6ce70860016e9ab0f0f226c54a2

Aliases

arxiv: 1308.3860 · arxiv_version: 1308.3860v2 · doi: 10.48550/arxiv.1308.3860 · pith_short_12: NFWIK3IFAXWO · pith_short_16: NFWIK3IFAXWOCJJP · pith_short_8: NFWIK3IF

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/NFWIK3IFAXWOCJJPQWEGHISMGO \
  | 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: 696c856d0505ece1252f858863a24c33b5b5f6ce70860016e9ab0f0f226c54a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ba7c7c4e79703a30fa4e2852775367ec6b986cbe003df205a071bbf385098ab",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA",
      "math.SP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2013-08-18T14:21:56Z",
    "title_canon_sha256": "0dac52946310284a1c412548cd0855eaa0cbf48257092222d4e4e49e0be15359"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.3860",
    "kind": "arxiv",
    "version": 2
  }
}