Pith Number

pith:6NK6DIW3

pith:2018:6NK6DIW37Q2P7DSZZTRW2TQLNU

not attested not anchored not stored refs pending

A finite element data assimilation method for the wave equation

Ali Feizmohammadi, Erik Burman, Lauri Oksanen

arxiv:1811.01580 v1 · 2018-11-05 · 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{6NK6DIW37Q2P7DSZZTRW2TQLNU}

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	2026-06-04T20:13:39.485554Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f355e1a2dbfc34ff8e59cce36d4e0b6d2f7d41459d837fa3eed61a9b6b19fea7

Aliases

arxiv: 1811.01580 · arxiv_version: 1811.01580v1 · doi: 10.48550/arxiv.1811.01580 · pith_short_12: 6NK6DIW37Q2P · pith_short_16: 6NK6DIW37Q2P7DSZ · pith_short_8: 6NK6DIW3

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/6NK6DIW37Q2P7DSZZTRW2TQLNU \
  | 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: f355e1a2dbfc34ff8e59cce36d4e0b6d2f7d41459d837fa3eed61a9b6b19fea7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5fa10e2529bf7e1d061ac276f0a0dd7d7c16dfe42ed4d3692c0f51d487a5cd5a",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-11-05T10:00:54Z",
    "title_canon_sha256": "fc47898823676290e1fd1341195d1c513de9ceaa832c2e363a2d93d57b7cec83"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.01580",
    "kind": "arxiv",
    "version": 1
  }
}