Pith Number

pith:Q7SAD57I

pith:2018:Q7SAD57IRPCLCCLN6XK4JCO2KQ

not attested not anchored not stored refs pending

An adjoint method for gradient-based optimization of stellarator coil shapes

A. Bader, E. J. Paul, M. Landreman, W. Dorland

arxiv:1801.04317 v1 · 2018-01-12 · physics.plasm-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q7SAD57IRPCLCCLN6XK4JCO2KQ}

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	2026-05-18T00:11:38.875145Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

87e401f7e88bc4b1096df5d5c489da543777612b77825040ca9c760de3ce080a

Aliases

arxiv: 1801.04317 · arxiv_version: 1801.04317v1 · doi: 10.48550/arxiv.1801.04317 · pith_short_12: Q7SAD57IRPCL · pith_short_16: Q7SAD57IRPCLCCLN · pith_short_8: Q7SAD57I

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/Q7SAD57IRPCLCCLN6XK4JCO2KQ \
  | 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: 87e401f7e88bc4b1096df5d5c489da543777612b77825040ca9c760de3ce080a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e303c8bde7b6bcd1940da954408a08744cb407f2b8a2de3b3b86ca89a0db5d4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.plasm-ph",
    "submitted_at": "2018-01-12T21:09:30Z",
    "title_canon_sha256": "6cb39494a82a4965f9bca794c677df1940e7de35fd3876b6435629fe5bcded77"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.04317",
    "kind": "arxiv",
    "version": 1
  }
}