Pith Number

pith:ZOSTSWUM

pith:2021:ZOSTSWUMD44FKDBH3HUE67BVD2

not attested not anchored not stored refs pending

Boundary integral formulations for acoustic modelling of high-contrast media

Elwin van 't Wout, Nader Saffari, Pierre G\'elat, Seyyed R. Haqshenas, Timo Betcke

arxiv:2104.04618 v2 · 2021-04-09 · 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{ZOSTSWUMD44FKDBH3HUE67BVD2}

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	2026-07-05T03:37:42.156618Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cba5395a8c1f38550c27d9e84f7c351ebbc99db38f784aaf5eb29efab3366d9d

Aliases

arxiv: 2104.04618 · arxiv_version: 2104.04618v2 · doi: 10.48550/arxiv.2104.04618 · pith_short_12: ZOSTSWUMD44F · pith_short_16: ZOSTSWUMD44FKDBH · pith_short_8: ZOSTSWUM

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/ZOSTSWUMD44FKDBH3HUE67BVD2 \
  | 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: cba5395a8c1f38550c27d9e84f7c351ebbc99db38f784aaf5eb29efab3366d9d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c753de50e0f8fbe0d152157e812c0f9f532cbdc84334d67495619bd92d5c55ee",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2021-04-09T21:45:26Z",
    "title_canon_sha256": "c7dfb3942157722b5a09ff30482a92450b011697c588f302e204e6c9f5c7f5b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2104.04618",
    "kind": "arxiv",
    "version": 2
  }
}