Pith Number

pith:R3TFNLEL

pith:2019:R3TFNLELMZKCZRO6UAYJ7ROUVB

not attested not anchored not stored refs pending

Levenberg-Marquardt methods with inexact projections for constrained nonlinear systems

Douglas S. Gon\c{c}alves, Fabr\'icia R. Oliveira, Max L. N. Gon\c{c}alves

arxiv:1908.06118 v1 · 2019-08-16 · 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{R3TFNLELMZKCZRO6UAYJ7ROUVB}

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	2026-07-04T23:58:12.667517Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8ee656ac8b66542cc5dea0309fc5d4a87f7df5a471dda72f46c85f521f9e7ed4

Aliases

arxiv: 1908.06118 · arxiv_version: 1908.06118v1 · doi: 10.48550/arxiv.1908.06118 · pith_short_12: R3TFNLELMZKC · pith_short_16: R3TFNLELMZKCZRO6 · pith_short_8: R3TFNLEL

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/R3TFNLELMZKCZRO6UAYJ7ROUVB \
  | 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: 8ee656ac8b66542cc5dea0309fc5d4a87f7df5a471dda72f46c85f521f9e7ed4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a696f6a3bc456fc6b83e0f66f2d67c468301ffdebd332621b375175e9dda3168",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2019-08-16T18:13:19Z",
    "title_canon_sha256": "4d7c3ddc65fea713eefc777e16917be9d39e6691e6737dd1051093a9419527e7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1908.06118",
    "kind": "arxiv",
    "version": 1
  }
}