Pith Number

pith:4QXUNLOE

pith:2018:4QXUNLOEXJOMSFMVEX4HTNMXT6

not attested not anchored not stored refs pending

Exclusion regions for parameter-dependent systems of equations

Bettina Ponleitner, Hermann Schichl

arxiv:1811.09269 v1 · 2018-11-22 · 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{4QXUNLOEXJOMSFMVEX4HTNMXT6}

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	2026-05-18T00:00:03.775389Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e42f46adc4ba5cc9159525f879b5979fb58bc41555049ba013f0d9ebf0bb98a2

Aliases

arxiv: 1811.09269 · arxiv_version: 1811.09269v1 · doi: 10.48550/arxiv.1811.09269 · pith_short_12: 4QXUNLOEXJOM · pith_short_16: 4QXUNLOEXJOMSFMV · pith_short_8: 4QXUNLOE

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/4QXUNLOEXJOMSFMVEX4HTNMXT6 \
  | 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: e42f46adc4ba5cc9159525f879b5979fb58bc41555049ba013f0d9ebf0bb98a2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "55aa7f7330f4f79953ea4342a230f86e9708d3573184426710a9d07fc52d7a99",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-11-22T18:30:40Z",
    "title_canon_sha256": "05fceb0b49f045707f085212adb9dfd09711a443bcd9208dd0c5a5c3ce904fbf"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1811.09269",
    "kind": "arxiv",
    "version": 1
  }
}