Pith Number

pith:A54AFVKL

pith:2018:A54AFVKLMNQA7XIRFXHOBMQHEA

not attested not anchored not stored refs pending

NURBS-SEM: a hybrid spectral element method on NURBS maps for the solution of elliptic PDEs on surfaces

Giuseppe Pitton, Luca Heltai

arxiv:1804.08271 v1 · 2018-04-23 · math.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{A54AFVKLMNQA7XIRFXHOBMQHEA}

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	2026-05-18T00:11:34.295807Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

077802d54b63600fdd112dcee0b20720256b423cd52ddd88fff4d54427e1bb82

Aliases

arxiv: 1804.08271 · arxiv_version: 1804.08271v1 · doi: 10.48550/arxiv.1804.08271 · pith_short_12: A54AFVKLMNQA · pith_short_16: A54AFVKLMNQA7XIR · pith_short_8: A54AFVKL

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/A54AFVKLMNQA7XIRFXHOBMQHEA \
  | 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: 077802d54b63600fdd112dcee0b20720256b423cd52ddd88fff4d54427e1bb82

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "71033c47a3ba516a34d8c30ee9e8400742bebc598937ceb966332b61195ba0a1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-04-23T07:47:38Z",
    "title_canon_sha256": "2908185b0ff2532d4f87bb5a27febb4db974c512ecf881edfb25db0ecaa6e1e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.08271",
    "kind": "arxiv",
    "version": 1
  }
}