Pith Number

pith:JYBI7A3K

pith:2015:JYBI7A3KNG2XQZEOJMF3X633Y5

not attested not anchored not stored refs pending

Preconditioning for boundary control problems in incompressible fluid dynamics

Andy Wathen, Gennadij Heidel

arxiv:1511.07375 v2 · 2015-11-23 · math.NA · math.OC

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JYBI7A3KNG2XQZEOJMF3X633Y5}

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	2026-05-18T00:32:44.786023Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4e028f836a69b578648e4b0bbbfb7bc773447e2d7172210db668ea3568b2171c

Aliases

arxiv: 1511.07375 · arxiv_version: 1511.07375v2 · doi: 10.48550/arxiv.1511.07375 · pith_short_12: JYBI7A3KNG2X · pith_short_16: JYBI7A3KNG2XQZEO · pith_short_8: JYBI7A3K

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/JYBI7A3KNG2XQZEOJMF3X633Y5 \
  | 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: 4e028f836a69b578648e4b0bbbfb7bc773447e2d7172210db668ea3568b2171c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4646baa8bcb5b78550b77343d1f3844a9a69a0e9d2d0d1897b18ff533dba5336",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2015-11-23T19:27:48Z",
    "title_canon_sha256": "13800275c4142d3518183185dabf6aa9ab504182010dffb0b118da1b7dc6073c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.07375",
    "kind": "arxiv",
    "version": 2
  }
}