Pith Number

pith:SEPCSX3M

pith:2009:SEPCSX3MPQGFZYOHPCKHDTSPDI

not attested not anchored not stored refs pending

Norm optimization problem for linear operators in classical Banach spaces

Daniel Pellegrino, Eduardo V. Teixeira

arxiv:0902.0454 v2 · 2009-02-03 · math.FA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SEPCSX3MPQGFZYOHPCKHDTSPDI}

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	2026-05-18T01:31:20.219225Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

911e295f6c7c0c5ce1c7789471ce4f1a099978b24cb6b3b725de437c8b18d957

Aliases

arxiv: 0902.0454 · arxiv_version: 0902.0454v2 · doi: 10.48550/arxiv.0902.0454 · pith_short_12: SEPCSX3MPQGF · pith_short_16: SEPCSX3MPQGFZYOH · pith_short_8: SEPCSX3M

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/SEPCSX3MPQGFZYOHPCKHDTSPDI \
  | 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: 911e295f6c7c0c5ce1c7789471ce4f1a099978b24cb6b3b725de437c8b18d957

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "96a0b041ad0145d95fd48ca883f806d0f7d6ec44e1a8a04bfd074092230f1cc8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.FA",
    "submitted_at": "2009-02-03T09:21:43Z",
    "title_canon_sha256": "5fe69778d241b3dea6b61df76fbdd203eae1db29c2c3539a2a97717aac4c8d9e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0902.0454",
    "kind": "arxiv",
    "version": 2
  }
}