Pith Number

pith:QSC2BZQU

pith:2018:QSC2BZQUSOXBLWRGDT2C55LN42

not attested not anchored not stored refs pending

A linear-time algorithm for generalized trust region subproblems

Duan Li, Rujun Jiang

arxiv:1807.07563 v2 · 2018-07-19 · 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{QSC2BZQUSOXBLWRGDT2C55LN42}

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	2026-05-17T23:47:03.052641Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8485a0e61493ae15da261cf42ef56de6b546b4563a5ac0ba2c1aba9b509881b0

Aliases

arxiv: 1807.07563 · arxiv_version: 1807.07563v2 · doi: 10.48550/arxiv.1807.07563 · pith_short_12: QSC2BZQUSOXB · pith_short_16: QSC2BZQUSOXBLWRG · pith_short_8: QSC2BZQU

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/QSC2BZQUSOXBLWRGDT2C55LN42 \
  | 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: 8485a0e61493ae15da261cf42ef56de6b546b4563a5ac0ba2c1aba9b509881b0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c6b58388cf51a68254f8c2221552b78b09664b4b49e81a704ba983f50897359e",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2018-07-19T17:59:37Z",
    "title_canon_sha256": "3f3c1330f82adeb6b5068fe6a639b7f3d32a034d904fbaaf3ab2a740f55271dd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.07563",
    "kind": "arxiv",
    "version": 2
  }
}