Pith Number

pith:BUVN77DV

pith:2018:BUVN77DVDADXW7L27UUC7HQEDW

not attested not anchored not stored refs pending

Spectra of Tridiagonal Matrices over a Field

C. R. Johnson, R. S. Costas-Santos

arxiv:1807.08877 v1 · 2018-07-24 · math.CA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BUVN77DVDADXW7L27UUC7HQEDW}

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	2026-05-18T00:09:57.569531Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d2adffc7518077b7d7afd282f9e041d9e3a26e0614f5f406c560595d461ddaa

Aliases

arxiv: 1807.08877 · arxiv_version: 1807.08877v1 · doi: 10.48550/arxiv.1807.08877 · pith_short_12: BUVN77DVDADX · pith_short_16: BUVN77DVDADXW7L2 · pith_short_8: BUVN77DV

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/BUVN77DVDADXW7L27UUC7HQEDW \
  | 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: 0d2adffc7518077b7d7afd282f9e041d9e3a26e0614f5f406c560595d461ddaa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92bc50290ae70d4383bb513de910592fb2114610fe376193d3ead0072dd35ce0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CA",
    "submitted_at": "2018-07-24T01:46:29Z",
    "title_canon_sha256": "c8d969fa110ab6201505ee2c8bac5c924a3d0f069c5c2f36133745b730c9b3a3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.08877",
    "kind": "arxiv",
    "version": 1
  }
}