Pith Number

pith:XGHH6YT6

pith:2012:XGHH6YT6RYMLLGMY56LFQWZUYJ

not attested not anchored not stored refs pending

Virtual Poincar\'e polynomial of the link of a real algebraic variety

Goulwen Fichou (IRMAR), Masahiro Shiota

arxiv:1201.0684 v1 · 2012-01-03 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XGHH6YT6RYMLLGMY56LFQWZUYJ}

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	2026-05-18T04:05:16.938079Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b98e7f627e8e18b59998ef96585b34c26384acc70ac07b3766bcd2a9100e80b7

Aliases

arxiv: 1201.0684 · arxiv_version: 1201.0684v1 · doi: 10.48550/arxiv.1201.0684 · pith_short_12: XGHH6YT6RYML · pith_short_16: XGHH6YT6RYMLLGMY · pith_short_8: XGHH6YT6

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/XGHH6YT6RYMLLGMY56LFQWZUYJ \
  | 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: b98e7f627e8e18b59998ef96585b34c26384acc70ac07b3766bcd2a9100e80b7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "76da81d4262eab435673c2f47c009599b221f7856e4b2026991e8feaaf762fb2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-01-03T16:07:55Z",
    "title_canon_sha256": "f2249357d1e0bbb753efdc6b526d90fe7e6a11cb05debd20312b006a7f6d0a62"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.0684",
    "kind": "arxiv",
    "version": 1
  }
}