Pith Number

pith:EIEAQQGZ

pith:2015:EIEAQQGZXUZ73UAYU24ULYOY6R

not attested not anchored not stored refs pending

Estimating the Trace of the Matrix Inverse by Interpolating from the Diagonal of an Approximate Inverse

Andreas Stathopoulos, Efstratios Gallopoulos, Jesse Laeuchli, Lingfei Wu, Vassilis Kalantzis

arxiv:1507.07227 v3 · 2015-07-26 · cs.NA · math.NA · quant-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{EIEAQQGZXUZ73UAYU24ULYOY6R}

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	2026-05-18T01:05:46.123462Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

22080840d9bd33fdd018a6b945e1d8f442965ad79b02b689844edfdc352970fb

Aliases

arxiv: 1507.07227 · arxiv_version: 1507.07227v3 · doi: 10.48550/arxiv.1507.07227 · pith_short_12: EIEAQQGZXUZ7 · pith_short_16: EIEAQQGZXUZ73UAY · pith_short_8: EIEAQQGZ

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/EIEAQQGZXUZ73UAYU24ULYOY6R \
  | 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: 22080840d9bd33fdd018a6b945e1d8f442965ad79b02b689844edfdc352970fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c8b392ee08e17e388da2df5101e1f75582ee4c33dd0827f951b387ef08014ae",
    "cross_cats_sorted": [
      "math.NA",
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2015-07-26T17:43:26Z",
    "title_canon_sha256": "c66565e3546c06652f8f257e51fa260dd7e94a5f3546fc68c024afa8c217b68f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1507.07227",
    "kind": "arxiv",
    "version": 3
  }
}