Pith Number

pith:ERV4CKQS

pith:2015:ERV4CKQSFDKN5Q5EVQ3FNJ56T4

not attested not anchored not stored refs pending

On the Hierarchical Preconditioning of the Combined Field Integral Equation

Francesco P. Andriulli, Simon B. Adrian, Thomas F. Eibert

arxiv:1509.02790 v1 · 2015-09-09 · 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{ERV4CKQSFDKN5Q5EVQ3FNJ56T4}

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	2026-05-18T00:54:41.422365Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

246bc12a1228d4dec3a4ac3656a7be9f39cd91860808df82fbb9edd84b9aaaf2

Aliases

arxiv: 1509.02790 · arxiv_version: 1509.02790v1 · doi: 10.48550/arxiv.1509.02790 · pith_short_12: ERV4CKQSFDKN · pith_short_16: ERV4CKQSFDKN5Q5E · pith_short_8: ERV4CKQS

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/ERV4CKQSFDKN5Q5EVQ3FNJ56T4 \
  | 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: 246bc12a1228d4dec3a4ac3656a7be9f39cd91860808df82fbb9edd84b9aaaf2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "edb89155a13df6396b2908924cacdee8c099e997b365beefe501a088604b17fd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-09-09T14:38:20Z",
    "title_canon_sha256": "252ae02815b042924f647772f6d05e964688b7caafe1346fd97cd44a7197b47b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.02790",
    "kind": "arxiv",
    "version": 1
  }
}