Pith Number

pith:O24JTZVU

pith:2014:O24JTZVUKCRGA6FMXV4QCMKVKG

not attested not anchored not stored refs pending

Optimal-order preconditioners for linear systems arising in the semismooth Newton solution of a class of control-constrained problems

Andrei Draganescu, Jyoti Saraswat

arxiv:1411.6065 v2 · 2014-11-22 · 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{O24JTZVUKCRGA6FMXV4QCMKVKG}

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	2026-05-18T01:20:53.979694Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

76b899e6b450a26078acbd79013155519ff767fb2df7d6dda3c8546cb9ac6cfe

Aliases

arxiv: 1411.6065 · arxiv_version: 1411.6065v2 · doi: 10.48550/arxiv.1411.6065 · pith_short_12: O24JTZVUKCRG · pith_short_16: O24JTZVUKCRGA6FM · pith_short_8: O24JTZVU

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/O24JTZVUKCRGA6FMXV4QCMKVKG \
  | 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: 76b899e6b450a26078acbd79013155519ff767fb2df7d6dda3c8546cb9ac6cfe

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "35c0db4302c95143aaaab0ed7e3832873a965d3abae76d67c0e6d80bfed8d5ff",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2014-11-22T03:06:19Z",
    "title_canon_sha256": "e77ad5a2638d4702e47ba4a6cb420d277c101d3478b3cb8d8a0b331c623dbe0f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.6065",
    "kind": "arxiv",
    "version": 2
  }
}