Pith Number

pith:GL3AHNFQ

pith:2007:GL3AHNFQXFK54DUDR4RRIYPL5C

not attested not anchored not stored refs pending

Accelerated Projected Gradient Method for Linear Inverse Problems with Sparsity Constraints

I. Daubechies, I. Loris, M. Fornasier

arxiv:0706.4297 v2 · 2007-06-28 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GL3AHNFQXFK54DUDR4RRIYPL5C}

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	2026-05-18T03:37:42.202803Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

32f603b4b0b955de0e838f231461ebe8856f3d85a1e2e5af6c42f2c2baef2aad

Aliases

arxiv: 0706.4297 · arxiv_version: 0706.4297v2 · doi: 10.48550/arxiv.0706.4297 · pith_short_12: GL3AHNFQXFK5 · pith_short_16: GL3AHNFQXFK54DUD · pith_short_8: GL3AHNFQ

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/GL3AHNFQXFK54DUDR4RRIYPL5C \
  | 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: 32f603b4b0b955de0e838f231461ebe8856f3d85a1e2e5af6c42f2c2baef2aad

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd6d7bdf291eb9cb4641aed416ecd8c8f7c268a81e1857eb2433297291ee6e7d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2007-06-28T18:44:37Z",
    "title_canon_sha256": "60e4642dd53ff8dc4a7e0ae88f81c843796896a13b7c0d7e894b10a6248f281c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0706.4297",
    "kind": "arxiv",
    "version": 2
  }
}