Pith Number

pith:UBPOVC5K

pith:2019:UBPOVC5K6JC3OMPR76FH4BRG7B

not attested not anchored not stored refs pending

New Laplace and Helmholtz solvers

Abinand Gopal, Lloyd N. Trefethen

arxiv:1902.00374 v1 · 2019-02-01 · 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{UBPOVC5K6JC3OMPR76FH4BRG7B}

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	2026-06-04T20:13:51.189404Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a05eea8baaf245b731f1ff8a7e0626f85a59cebdf729e2d175142fa840862467

Aliases

arxiv: 1902.00374 · arxiv_version: 1902.00374v1 · doi: 10.48550/arxiv.1902.00374 · pith_short_12: UBPOVC5K6JC3 · pith_short_16: UBPOVC5K6JC3OMPR · pith_short_8: UBPOVC5K

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/UBPOVC5K6JC3OMPR76FH4BRG7B \
  | 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: a05eea8baaf245b731f1ff8a7e0626f85a59cebdf729e2d175142fa840862467

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "322ecf016a2bf6034d3c29f653c3b22b037d903f4bac7e742edb58cca5526916",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-02-01T14:46:14Z",
    "title_canon_sha256": "5f49e7d32c1b030b6d796ba1b09688aa934509a07718d05db9f2f4abd7f685f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.00374",
    "kind": "arxiv",
    "version": 1
  }
}