Pith Number

pith:OB7CUJ3R

pith:2026:OB7CUJ3RI6CYBPWBITFDFROLG7

not attested not anchored not stored refs pending

DG = FEM + flat elements, Part I: Diffusion

Antoine Quiriny, Chi-Wang Shu, Jean-Fran\c{c}ois Remacle, Ji\v{r}\'i Szotkowski, Jonathan Lambrechts, Nicolas Mo\"es, V\'aclav Ku\v{c}era

arxiv:2605.19037 v1 · 2026-05-18 · 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{OB7CUJ3RI6CYBPWBITFDFROLG7}

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	2026-05-20T01:05:21.581067Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

707e2a2771478580bec144ca32c5cb37d4d8f603f64890eb4132456f3a1d6e66

Aliases

arxiv: 2605.19037 · arxiv_version: 2605.19037v1 · doi: 10.48550/arxiv.2605.19037 · pith_short_12: OB7CUJ3RI6CY · pith_short_16: OB7CUJ3RI6CYBPWB · pith_short_8: OB7CUJ3R

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/OB7CUJ3RI6CYBPWBITFDFROLG7 \
  | 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: 707e2a2771478580bec144ca32c5cb37d4d8f603f64890eb4132456f3a1d6e66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e20594200c59b45210ef57fca45de537b1de80c0cf422adf481d775e8148700e",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-05-18T18:59:14Z",
    "title_canon_sha256": "efc862702c474f7bb7dc2f33b5e96c403ae7d85e3e1a3c0a9ff7c8c4539a2c1c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.19037",
    "kind": "arxiv",
    "version": 1
  }
}