Pith Number

pith:J3Q7QGSS

pith:2013:J3Q7QGSST2M5DMFYVJUI7C2KAA

not attested not anchored not stored refs pending

A normalized scaled gradient method to solve non-negativity and equality constrained linear inverse problem - Application to spectral mixture analysis

Andr\'e Ferrari, C\'edric Richard, C\'eline Theys, Henri Lant\'eri, Jean-Yves Tourneret, Nicolas Dobigeon

arxiv:1310.0676 v1 · 2013-10-02 · math.OC · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{J3Q7QGSST2M5DMFYVJUI7C2KAA}

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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	2026-05-18T03:11:34.366836Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4ee1f81a529e99d1b0b8aa688f8b4a002294a0c704022509507163d0cd54446c

Aliases

arxiv: 1310.0676 · arxiv_version: 1310.0676v1 · doi: 10.48550/arxiv.1310.0676 · pith_short_12: J3Q7QGSST2M5 · pith_short_16: J3Q7QGSST2M5DMFY · pith_short_8: J3Q7QGSS

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/J3Q7QGSST2M5DMFYVJUI7C2KAA \
  | 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: 4ee1f81a529e99d1b0b8aa688f8b4a002294a0c704022509507163d0cd54446c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ea5b3d87ffb344e964c86d63a558a4ae0846a87e63c6762931128a5ef835bad9",
    "cross_cats_sorted": [
      "physics.data-an"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2013-10-02T12:18:18Z",
    "title_canon_sha256": "2c021c18b46dcaf1c941607741602f0afc56b6808c8beb54b261548e06aa8742"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1310.0676",
    "kind": "arxiv",
    "version": 1
  }
}