Pith Number

pith:ZNFJFBHC

pith:2018:ZNFJFBHCWQBO27NBQMRGVTCI7D

not attested not anchored not stored refs pending

A Two-Stage Preconditioner for Multiphase Poromechanics in Reservoir Simulation

Daniel Osei-Kuffuor, Hamdi A. Tchelepi, Joshua A. White, Nicola Castelletto, Quan M. Bui, Sergey Klevtsov

arxiv:1812.05540 v1 · 2018-12-10 · 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{ZNFJFBHCWQBO27NBQMRGVTCI7D}

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	2026-06-04T20:13:47.793534Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cb4a9284e2b402ed7da183226acc48f8d08d8254dee65ece42dd16796696434a

Aliases

arxiv: 1812.05540 · arxiv_version: 1812.05540v1 · doi: 10.48550/arxiv.1812.05540 · pith_short_12: ZNFJFBHCWQBO · pith_short_16: ZNFJFBHCWQBO27NB · pith_short_8: ZNFJFBHC

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/ZNFJFBHCWQBO27NBQMRGVTCI7D \
  | 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: cb4a9284e2b402ed7da183226acc48f8d08d8254dee65ece42dd16796696434a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "04d46224eb63dc92e32b7a76633b1d5bc3ad01ad50c7a7307bc77e06263d989b",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-12-10T22:15:22Z",
    "title_canon_sha256": "2b9642c356d642c945b174cdfe9b4172dac53faf7b24f6e04f729774b633dc4b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1812.05540",
    "kind": "arxiv",
    "version": 1
  }
}