Pith Number

pith:NUR5G5BU

pith:2019:NUR5G5BUZFQBPKYQ7KY6MYP4L6

not attested not anchored not stored refs pending

Upper Hessenberg and Toeplitz Bohemians

Eunice Y. S. Chan, J. Rafael Sendra, Juana Sendra, Laureano Gonzalez-Vega, Robert M. Corless

arxiv:1907.10677 v1 · 2019-07-23 · cs.SC · cs.NA · 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{NUR5G5BUZFQBPKYQ7KY6MYP4L6}

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	2026-05-17T23:39:34.806610Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6d23d37434c96017ab10fab1e661fc5fbd2e1f3072d2d33cc982775992c31d68

Aliases

arxiv: 1907.10677 · arxiv_version: 1907.10677v1 · doi: 10.48550/arxiv.1907.10677 · pith_short_12: NUR5G5BUZFQB · pith_short_16: NUR5G5BUZFQBPKYQ · pith_short_8: NUR5G5BU

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/NUR5G5BUZFQBPKYQ7KY6MYP4L6 \
  | 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: 6d23d37434c96017ab10fab1e661fc5fbd2e1f3072d2d33cc982775992c31d68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78ef518e461ad615873143e1411139b2b0ad13435829714e0c318bc109bc8096",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SC",
    "submitted_at": "2019-07-23T16:39:11Z",
    "title_canon_sha256": "9f735d9d75fadb4c6d99e4fa191f17b8fc14df0089e7defc8de941402b45e5be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.10677",
    "kind": "arxiv",
    "version": 1
  }
}