Pith Number

pith:QQ23UC67

pith:2014:QQ23UC67TNZRF6KPQIXLMVLQMY

not attested not anchored not stored refs pending

A Fast Algorithm for Parabolic PDE-based Inverse Problems Based on Laplace Transforms and Flexible Krylov Solvers

Arvind K. Saibaba, Peter K. Kitanidis, Tania Bakhos

arxiv:1409.2556 v2 · 2014-09-09 · 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{QQ23UC67TNZRF6KPQIXLMVLQMY}

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	2026-05-18T01:15:47.192257Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8435ba0bdf9b7312f94f822eb6557066177f8c8eec2c30b044e16262adf03bb6

Aliases

arxiv: 1409.2556 · arxiv_version: 1409.2556v2 · doi: 10.48550/arxiv.1409.2556 · pith_short_12: QQ23UC67TNZR · pith_short_16: QQ23UC67TNZRF6KP · pith_short_8: QQ23UC67

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/QQ23UC67TNZRF6KPQIXLMVLQMY \
  | 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: 8435ba0bdf9b7312f94f822eb6557066177f8c8eec2c30b044e16262adf03bb6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "02888def9629418284ce2b3f1d02ada05f92c8f6aace2a12eb4996b429fc6f77",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2014-09-09T00:23:41Z",
    "title_canon_sha256": "d21b0719a414d9450d8430cbadf183e11dc76d43fcf499e2199a9e02e5263a76"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1409.2556",
    "kind": "arxiv",
    "version": 2
  }
}