Pith Number

pith:QPFDQWDC

pith:2019:QPFDQWDCMR7OBMZOIBE4HII53R

not attested not anchored not stored refs pending

Incorporating variable viscosity in vorticity-based formulations for Brinkman equations

Bryan G\'omez-Vargas, David Mora, Ricardo Ruiz-Baier, Ver\'onica Anaya

arxiv:1905.01779 v1 · 2019-05-06 · 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{QPFDQWDCMR7OBMZOIBE4HII53R}

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	2026-05-17T23:46:57.445437Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83ca385862647ee0b32e4049c3a11ddc7e76b1a27509b6aa4867963b1519dcf0

Aliases

arxiv: 1905.01779 · arxiv_version: 1905.01779v1 · doi: 10.48550/arxiv.1905.01779 · pith_short_12: QPFDQWDCMR7O · pith_short_16: QPFDQWDCMR7OBMZO · pith_short_8: QPFDQWDC

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/QPFDQWDCMR7OBMZOIBE4HII53R \
  | 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: 83ca385862647ee0b32e4049c3a11ddc7e76b1a27509b6aa4867963b1519dcf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "46cc8da81d6468aa0fecee4d478d30e295d5a379618ac6c402381a6cd78f8f45",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2019-05-06T01:14:50Z",
    "title_canon_sha256": "266e0cf39aed8cf0ca1ef115c79fd555a1c91ec6c37dbbefca488e1a17c2f8c2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.01779",
    "kind": "arxiv",
    "version": 1
  }
}