Pith Number

pith:A7KE4G2H

pith:2014:A7KE4G2HIKO5ZZ5HPUDN6LDZ66

not attested not anchored not stored refs pending

A Preconditioner for a Primal-Dual Newton Conjugate Gradients Method for Compressed Sensing Problems

Ioannis Dassios, Jacek Gondzio, Kimon Fountoulakis

arxiv:1501.00047 v2 · 2014-12-30 · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A7KE4G2HIKO5ZZ5HPUDN6LDZ66}

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	2026-05-18T01:37:28.443390Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

07d44e1b47429ddce7a77d06df2c79f7893da1fa8971a8c567173a08c8cf0237

Aliases

arxiv: 1501.00047 · arxiv_version: 1501.00047v2 · doi: 10.48550/arxiv.1501.00047 · pith_short_12: A7KE4G2HIKO5 · pith_short_16: A7KE4G2HIKO5ZZ5H · pith_short_8: A7KE4G2H

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/A7KE4G2HIKO5ZZ5HPUDN6LDZ66 \
  | 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: 07d44e1b47429ddce7a77d06df2c79f7893da1fa8971a8c567173a08c8cf0237

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "097b82fc135127313020af5c36d5c12c75386b5e7940d22af857eeccf73e94e6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2014-12-30T23:48:08Z",
    "title_canon_sha256": "57a60dd107c06f410b9ff2b0ec9315c9388f6b30d6e2a387b1759c408f6349e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.00047",
    "kind": "arxiv",
    "version": 2
  }
}