Pith Number

pith:QZTHVXJK

pith:2017:QZTHVXJKA53SQWLGMJT3ZRKKPZ

not attested not anchored not stored refs pending

Computing spectra without solving eigenvalue problems

David Jerison, Douglas Arnold, Guy David, Marcel Filoche, Svitlana Mayboroda

arxiv:1711.04888 v2 · 2017-11-13 · 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{QZTHVXJKA53SQWLGMJT3ZRKKPZ}

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	2026-05-18T00:06:51.033412Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

86667add2a07772859666267bcc54a7e42ce74f11ae1fb931e619969cb6fc98e

Aliases

arxiv: 1711.04888 · arxiv_version: 1711.04888v2 · doi: 10.48550/arxiv.1711.04888 · pith_short_12: QZTHVXJKA53S · pith_short_16: QZTHVXJKA53SQWLG · pith_short_8: QZTHVXJK

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/QZTHVXJKA53SQWLGMJT3ZRKKPZ \
  | 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: 86667add2a07772859666267bcc54a7e42ce74f11ae1fb931e619969cb6fc98e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "344ae0ea40c3150eee4ecb75fa32048f1dc63950c19b16d43a9b8ab1b412fee8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-11-13T23:21:40Z",
    "title_canon_sha256": "0a325cd538913db01e2e5fe14990441a09cb7604c0c3752b501acd8e7bf82366"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.04888",
    "kind": "arxiv",
    "version": 2
  }
}