Pith Number

pith:7ARCHREH

pith:2019:7ARCHREH45T66CH5G6ENDTH45P

not attested not anchored not stored refs pending

Deep Learning of Preconditioners for Conjugate Gradient Solvers in Urban Water Related Problems

Johannes Sappl, Laurent Seiler, Matthias Harders, Wolfgang Rauch

arxiv:1906.06925 v1 · 2019-06-17 · cs.LG · cs.NA · math.NA · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{7ARCHREH45T66CH5G6ENDTH45P}

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	2026-05-17T23:43:12.309270Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f82223c487e767ef08fd3788d1ccfcebf82663cb58090be4817c67cdc72ca0bd

Aliases

arxiv: 1906.06925 · arxiv_version: 1906.06925v1 · doi: 10.48550/arxiv.1906.06925 · pith_short_12: 7ARCHREH45T6 · pith_short_16: 7ARCHREH45T66CH5 · pith_short_8: 7ARCHREH

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/7ARCHREH45T66CH5G6ENDTH45P \
  | 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: f82223c487e767ef08fd3788d1ccfcebf82663cb58090be4817c67cdc72ca0bd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6c54fa1d7d6909445b11639c57666d15c993290a803971e94d7c4d7df9babf21",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-06-17T09:57:06Z",
    "title_canon_sha256": "5cee94a79897ce457c771a8ebb904fb4c5eb7f16fedfe99c3bebc4b4eec0cf10"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1906.06925",
    "kind": "arxiv",
    "version": 1
  }
}