Pith Number

pith:XD2WN5C7

pith:1996:XD2WN5C776EQXTL2HX4OJRFACC

not attested not anchored not stored refs pending

Chern classes for singular hypersurfaces

Paolo Aluffi

arxiv:alg-geom/9607011 v1 · 1996-07-10 · alg-geom · 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{XD2WN5C776EQXTL2HX4OJRFACC}

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	2026-05-18T03:58:14.595173Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8f566f45fff890bcd7a3df8e4c4a01086a6cd8762463f171af5ef3c93eb7082

Aliases

arxiv: alg-geom/9607011 · arxiv_version: alg-geom/9607011v1 · doi: 10.48550/arxiv.alg-geom/9607011 · pith_short_12: XD2WN5C776EQ · pith_short_16: XD2WN5C776EQXTL2 · pith_short_8: XD2WN5C7

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/XD2WN5C776EQXTL2HX4OJRFACC \
  | 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: b8f566f45fff890bcd7a3df8e4c4a01086a6cd8762463f171af5ef3c93eb7082

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c1b83c87a61665072f30bf818fa83508d2587d7f1f2a3fedb1b246edc4c63c3",
    "cross_cats_sorted": [
      "math.AG"
    ],
    "license": "",
    "primary_cat": "alg-geom",
    "submitted_at": "1996-07-10T14:36:34Z",
    "title_canon_sha256": "63f734fbd4477c5a77a42e3cfaad50e881f7bd46434f02568ccff62e7a2f8bb7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "alg-geom/9607011",
    "kind": "arxiv",
    "version": 1
  }
}