Pith Number

pith:EO4VRZO3

pith:2009:EO4VRZO3CMNMVM3HGX26OKMR5Y

not attested not anchored not stored refs pending

Finite Galois covers, cohomology jump loci, formality properties, and multinets

Alexandru Dimca, Stefan Papadima

arxiv:0906.1040 v1 · 2009-06-05 · math.AG · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{EO4VRZO3CMNMVM3HGX26OKMR5Y}

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	2026-05-18T03:43:53.156812Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

23b958e5db131acab36735f5e72991ee18ccd010af37665942d49b3c07c09ece

Aliases

arxiv: 0906.1040 · arxiv_version: 0906.1040v1 · doi: 10.48550/arxiv.0906.1040 · pith_short_12: EO4VRZO3CMNM · pith_short_16: EO4VRZO3CMNMVM3H · pith_short_8: EO4VRZO3

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/EO4VRZO3CMNMVM3HGX26OKMR5Y \
  | 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: 23b958e5db131acab36735f5e72991ee18ccd010af37665942d49b3c07c09ece

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "37d57c4c3986355a4c7975cffddfa35e53cd426682f8b0eaafe80ea3ba57b725",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2009-06-05T06:45:02Z",
    "title_canon_sha256": "424e9fa2ae9fb52a8a14e28c65dee4ddba8b510ba998583f88960901f41c7c20"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0906.1040",
    "kind": "arxiv",
    "version": 1
  }
}