Pith Number

pith:RHND5TJK

pith:2026:RHND5TJKLUPBM4XZ6KXFAGMU4Z

not attested not anchored not stored refs pending

Optical analogy for stellarators: Ridges as caustics and coils as singularities

Amitava Bhattacharjee, Andrew Brown, John Kappel, Nikita Nikulsin, Pedro F. Gil, Per Helander, Richard Nies, Rogerio Jorge, Stefan Buller, Wrick Sengupta

arxiv:2605.21814 v1 · 2026-05-20 · 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{RHND5TJKLUPBM4XZ6KXFAGMU4Z}

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	2026-05-22T01:04:09.086828Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

89da3ecd2a5d1e1672f9f2ae501994e64def1da488afd850ad5ea9b34bdf0072

Aliases

arxiv: 2605.21814 · arxiv_version: 2605.21814v1 · doi: 10.48550/arxiv.2605.21814 · pith_short_12: RHND5TJKLUPB · pith_short_16: RHND5TJKLUPBM4XZ · pith_short_8: RHND5TJK

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/RHND5TJKLUPBM4XZ6KXFAGMU4Z \
  | 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: 89da3ecd2a5d1e1672f9f2ae501994e64def1da488afd850ad5ea9b34bdf0072

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2d849ff2ca0a578108ff07ffd50ff2595507594e749c150be88b8a02271e992d",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.plasm-ph",
    "submitted_at": "2026-05-20T23:26:33Z",
    "title_canon_sha256": "144594fa545a6622953cfd7ca4ab5cfcca490806ab1c9da155b9b5e6b5587022"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.21814",
    "kind": "arxiv",
    "version": 1
  }
}