Pith Number

pith:TPCQLNPT

pith:2019:TPCQLNPT6K2V5K7HMODMQSN6TJ

not attested not anchored not stored refs pending

A block preconditioner for non-isothermal flow in porous media

Andrew J. Wathen, Christopher Lemon, Thomas Roy, Tom B. J\"onsth\"ovel

arxiv:1902.00095 v2 · 2019-01-31 · math.NA · cs.NA · physics.comp-ph · physics.flu-dyn

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TPCQLNPT6K2V5K7HMODMQSN6TJ}

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	2026-05-17T23:43:09.101421Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9bc505b5f3f2b55eabe76386c849be9a6d5e01d934eb7edce689f2b4f6d335b6

Aliases

arxiv: 1902.00095 · arxiv_version: 1902.00095v2 · doi: 10.48550/arxiv.1902.00095 · pith_short_12: TPCQLNPT6K2V · pith_short_16: TPCQLNPT6K2V5K7H · pith_short_8: TPCQLNPT

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/TPCQLNPT6K2V5K7HMODMQSN6TJ \
  | 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: 9bc505b5f3f2b55eabe76386c849be9a6d5e01d934eb7edce689f2b4f6d335b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f67bf5097da567d7971e7d4bf3def77de78509c1dd70774f3bb4ae434d9a2d2a",
    "cross_cats_sorted": [
      "cs.NA",
      "physics.comp-ph",
      "physics.flu-dyn"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-01-31T22:10:06Z",
    "title_canon_sha256": "5458d570d28e668461b741a0d74d35047059d8c73bc8e443ce39349301d911c6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.00095",
    "kind": "arxiv",
    "version": 2
  }
}