Pith Number

pith:7KCR32YJ

pith:2015:7KCR32YJKEM5WUF7GHSB2IVDBG

not attested not anchored not stored refs pending

Well Control Optimization using Derivative-Free Algorithms and a Multiscale Approach

Qihong Feng, Ronald D. Haynes, Xiang Wang

arxiv:1509.04693 v1 · 2015-09-15 · math.OC · cs.CE · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7KCR32YJKEM5WUF7GHSB2IVDBG}

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	2026-05-18T01:32:58.264474Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fa851deb095119db50bf31e41d22a309873fa21016bf3cb42561cfa0ada693e6

Aliases

arxiv: 1509.04693 · arxiv_version: 1509.04693v1 · doi: 10.48550/arxiv.1509.04693 · pith_short_12: 7KCR32YJKEM5 · pith_short_16: 7KCR32YJKEM5WUF7 · pith_short_8: 7KCR32YJ

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/7KCR32YJKEM5WUF7GHSB2IVDBG \
  | 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: fa851deb095119db50bf31e41d22a309873fa21016bf3cb42561cfa0ada693e6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fe1e5c1248ebd7528db74be0faad9c5ee7affbfe643ba7c1971070458bdcf453",
    "cross_cats_sorted": [
      "cs.CE",
      "physics.flu-dyn"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2015-09-15T19:26:49Z",
    "title_canon_sha256": "9557293c4a87766048f03d37a2036ef587dfc4bec75c471e89a23573e4ea9ae2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.04693",
    "kind": "arxiv",
    "version": 1
  }
}