Pith Number

pith:M5FBQGVG

pith:2018:M5FBQGVGISS7EJCVPQPKQHEP3W

not attested not anchored not stored refs pending

On the geometry of the set of symmetric matrices with repeated eigenvalues

Antonio Lerario, Khazhgali Kozhasov, Paul Breiding

arxiv:1807.04530 v2 · 2018-07-12 · math.AG · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{M5FBQGVGISS7EJCVPQPKQHEP3W}

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	2026-05-18T00:10:36.661629Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

674a181aa644a5f224557c1ea81c8fdda951afbf93ddf6d3ae6ae57aa0ad35d0

Aliases

arxiv: 1807.04530 · arxiv_version: 1807.04530v2 · doi: 10.48550/arxiv.1807.04530 · pith_short_12: M5FBQGVGISS7 · pith_short_16: M5FBQGVGISS7EJCV · pith_short_8: M5FBQGVG

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/M5FBQGVGISS7EJCVPQPKQHEP3W \
  | 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: 674a181aa644a5f224557c1ea81c8fdda951afbf93ddf6d3ae6ae57aa0ad35d0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d9fe1ce35921244b7fb2175a72c5bfa674d8241064bc675aa4164b2f4067ca82",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-07-12T10:40:55Z",
    "title_canon_sha256": "cd209953f7881817c283639e3aa5a88588d9c0c77b315d75ed9e8a00d8167bde"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.04530",
    "kind": "arxiv",
    "version": 2
  }
}