Pith Number

pith:EWRF4LKV

pith:2009:EWRF4LKVW2NZGBJ3SHNEVQAR6R

not attested not anchored not stored refs pending

Galerkin Methods for Parabolic and SCHR{\"O}DINGER Equations with Dynamical Boundary Conditions and Applications to Underwater Acoustics

D. C. Antonopoulou, G. E. Zouraris, V. A. Dougalis

arxiv:0904.3900 v1 · 2009-04-24 · 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{EWRF4LKVW2NZGBJ3SHNEVQAR6R}

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	2026-06-03T23:06:25.794487Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

25a25e2d55b69b93053b91da4ac011f45096abfb71ca5c38a58b3f7a73d88eeb

Aliases

arxiv: 0904.3900 · arxiv_version: 0904.3900v1 · doi: 10.48550/arxiv.0904.3900 · pith_short_12: EWRF4LKVW2NZ · pith_short_16: EWRF4LKVW2NZGBJ3 · pith_short_8: EWRF4LKV

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/EWRF4LKVW2NZGBJ3SHNEVQAR6R \
  | 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: 25a25e2d55b69b93053b91da4ac011f45096abfb71ca5c38a58b3f7a73d88eeb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dc9a6e3341dc7153a270e481f636d8c5e59a0688a7cf0c662f2263e9e0b1c091",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-04-24T16:11:43Z",
    "title_canon_sha256": "2789d5bb26314d0d4cc90befbadb16d58079b6c4b8e910f2c200d539c7cba47e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0904.3900",
    "kind": "arxiv",
    "version": 1
  }
}