Pith Number

pith:2CM2KBUV

pith:2018:2CM2KBUVJF5KUQ4EZYJHWQSERD

not attested not anchored not stored refs pending

Locating a complex inhomogeneous medium with an approximate factorization method

Fenglong Qu, Haiwen Zhang

arxiv:1811.00905 v1 · 2018-11-02 · 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{2CM2KBUVJF5KUQ4EZYJHWQSERD}

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	2026-05-17T23:50:23.179043Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d099a50695497aaa4384ce127b424488db0bbf7d228ccd7f4f24fa54f60e3231

Aliases

arxiv: 1811.00905 · arxiv_version: 1811.00905v1 · doi: 10.48550/arxiv.1811.00905 · pith_short_12: 2CM2KBUVJF5K · pith_short_16: 2CM2KBUVJF5KUQ4E · pith_short_8: 2CM2KBUV

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/2CM2KBUVJF5KUQ4EZYJHWQSERD \
  | 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: d099a50695497aaa4384ce127b424488db0bbf7d228ccd7f4f24fa54f60e3231

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0c0c49d466d39aa10e3e59edc724c3882ae93421920bfb2bf09fb954015893c9",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-11-02T14:54:21Z",
    "title_canon_sha256": "cc35e969bc405c580756d9b4c6e808e79464cb3da9c92ec4af54ee17b748f373"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.00905",
    "kind": "arxiv",
    "version": 1
  }
}