Pith Number

pith:FEIO2FGK

pith:2019:FEIO2FGKG44TONHCLO2ABTHOBZ

not attested not anchored not stored refs pending

Optimally Perturbed Identity Matrices of Rank 2

Robi Bhattacharjee

arxiv:1907.05589 v1 · 2019-07-12 · math.MG · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FEIO2FGKG44TONHCLO2ABTHOBZ}

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	2026-05-17T23:40:47.755402Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2910ed14ca37393734e25bb400ccee0e6ca7fcb5e52384beed7658f2f5083621

Aliases

arxiv: 1907.05589 · arxiv_version: 1907.05589v1 · doi: 10.48550/arxiv.1907.05589 · pith_short_12: FEIO2FGKG44T · pith_short_16: FEIO2FGKG44TONHC · pith_short_8: FEIO2FGK

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/FEIO2FGKG44TONHCLO2ABTHOBZ \
  | 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: 2910ed14ca37393734e25bb400ccee0e6ca7fcb5e52384beed7658f2f5083621

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0efd955039fa31dc9d6b35171463ca5ae39ccc2e0ec590b9d2dcc8bd4c09044",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2019-07-12T06:20:42Z",
    "title_canon_sha256": "91a7ba285e122d31e94f800fbd21e5f51f2fbd72ada95358f8f984b174d934b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.05589",
    "kind": "arxiv",
    "version": 1
  }
}