Pith Number

pith:PXBR7F3J

pith:2021:PXBR7F3JKAJDW2JH6J7XPT2CZB

not attested not anchored not stored refs pending

Multilevel Active-Set Trust-Region (MASTR) Method for Bound Constrained Minimization

Alena Kopani\v{c}\'akov\'a, Rolf Krause

arxiv:2103.14552 v2 · 2021-03-26 · math.NA · cs.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{PXBR7F3JKAJDW2JH6J7XPT2CZB}

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	2026-07-05T02:26:58.035341Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7dc31f976950123b6927f27f77cf42c877dfb78f170f2b4a592ff4f15ce46842

Aliases

arxiv: 2103.14552 · arxiv_version: 2103.14552v2 · doi: 10.48550/arxiv.2103.14552 · pith_short_12: PXBR7F3JKAJD · pith_short_16: PXBR7F3JKAJDW2JH · pith_short_8: PXBR7F3J

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/PXBR7F3JKAJDW2JH6J7XPT2CZB \
  | 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: 7dc31f976950123b6927f27f77cf42c877dfb78f170f2b4a592ff4f15ce46842

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a3f58118e87a0e905f65ee16f4f95e974fa49df6f9f27da695f0d3494d3a5b3a",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2021-03-26T16:12:47Z",
    "title_canon_sha256": "a528559d7fb1283d5d4ff3ed8853a57b10abb2d554d5445c499527dedcf8e281"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.14552",
    "kind": "arxiv",
    "version": 2
  }
}