Pith Number

pith:QPH7FXJH

pith:2019:QPH7FXJHLQ554YLYQOTT2X75J3

not attested not anchored not stored refs pending

Tensor B-Spline Numerical Methods for PDEs: a High-Performance Alternative to FEM

Dmytro Shulga, Felix Friedrich, Oleksii Morozov, Patrick Hunziker, Volker Roth

arxiv:1904.03057 v1 · 2019-04-05 · 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{QPH7FXJHLQ554YLYQOTT2X75J3}

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	2026-05-17T23:49:18.743341Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83cff2dd275c3bde617883a73d5ffd4eddd474034c36c30c9d81b650580f130f

Aliases

arxiv: 1904.03057 · arxiv_version: 1904.03057v1 · doi: 10.48550/arxiv.1904.03057 · pith_short_12: QPH7FXJHLQ55 · pith_short_16: QPH7FXJHLQ554YLY · pith_short_8: QPH7FXJH

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/QPH7FXJHLQ554YLYQOTT2X75J3 \
  | 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: 83cff2dd275c3bde617883a73d5ffd4eddd474034c36c30c9d81b650580f130f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "242256446b59516bd3767a1e09bc9613ad412cd4771c5ad76f1ff15468690475",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2019-04-05T13:33:13Z",
    "title_canon_sha256": "c4ef5337d492de0cd60389a50be756444f2ee1983d38f62473e84e5a52710745"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.03057",
    "kind": "arxiv",
    "version": 1
  }
}