Pith Number

pith:UB34DK7Y

pith:2017:UB34DK7YW5UXIKD3Q6DDGIA3Z2

not attested not anchored not stored refs pending

Randomized Truncated SVD Levenberg-Marquardt Approach to Geothermal Natural State and History Matching

Elvar K. Bjarkason, John P. O'Sullivan, Michael J. O'Sullivan, Oliver J. Maclaren

arxiv:1710.01031 v1 · 2017-10-03 · math.OC · physics.geo-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UB34DK7YW5UXIKD3Q6DDGIA3Z2}

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	2026-05-18T00:15:20.743843Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a077c1abf8b76974287b878633201bcebcab914a4a36072be0c4604587aff4a3

Aliases

arxiv: 1710.01031 · arxiv_version: 1710.01031v1 · doi: 10.48550/arxiv.1710.01031 · pith_short_12: UB34DK7YW5UX · pith_short_16: UB34DK7YW5UXIKD3 · pith_short_8: UB34DK7Y

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/UB34DK7YW5UXIKD3Q6DDGIA3Z2 \
  | 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: a077c1abf8b76974287b878633201bcebcab914a4a36072be0c4604587aff4a3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "48420dbfcbbadaa3bce1738e42187761ab50d6c4bed844c4538a7bd34423a100",
    "cross_cats_sorted": [
      "physics.geo-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2017-10-03T08:36:51Z",
    "title_canon_sha256": "1e05a2a4a78c22e711a1f729dcf8485b3f06782245bcee6163a1f8c770d95736"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1710.01031",
    "kind": "arxiv",
    "version": 1
  }
}