Pith Number

pith:XE4GQTO5

pith:2021:XE4GQTO57IGMHX6FX4WI3ETS5J

not attested not anchored not stored refs pending

A variational interpretation of Restricted Additive Schwarz with impedance transmission condition for the Helmholtz problem

Euan A. Spence, Ivan G. Graham, Martin J. Gander, Shihua Gong

arxiv:2103.11379 v2 · 2021-03-21 · 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{XE4GQTO57IGMHX6FX4WI3ETS5J}

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	2026-07-05T02:48:10.667072Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b938684dddfa0cc3dfc5bf2c8d9272ea4a0c7233e6f06e58898440cded381ae4

Aliases

arxiv: 2103.11379 · arxiv_version: 2103.11379v2 · doi: 10.48550/arxiv.2103.11379 · pith_short_12: XE4GQTO57IGM · pith_short_16: XE4GQTO57IGMHX6F · pith_short_8: XE4GQTO5

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/XE4GQTO57IGMHX6FX4WI3ETS5J \
  | 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: b938684dddfa0cc3dfc5bf2c8d9272ea4a0c7233e6f06e58898440cded381ae4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e221aea8fd51921ffe51dd0c1f65058f57704396d463a49fb97a008f31bccad7",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2021-03-21T12:19:58Z",
    "title_canon_sha256": "d538ec8d91def9b8ce8f11e97f7f360070155e6b437b13e4525fbf62e271793a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2103.11379",
    "kind": "arxiv",
    "version": 2
  }
}