Pith Number

pith:XSPP3CEL

pith:2014:XSPP3CELLIX37CVWXWMR7DTOXY

not attested not anchored not stored refs pending

An equivariant version of the Euler obstruction

Sabir M. Gusein-Zade, Wolfgang Ebeling

arxiv:1407.6587 v1 · 2014-07-24 · 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{XSPP3CELLIX37CVWXWMR7DTOXY}

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	2026-05-18T02:46:38.398513Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc9efd888b5a2fbf8ab6bd991f8e6ebe0ba2def7f6b3b236204f535623892e42

Aliases

arxiv: 1407.6587 · arxiv_version: 1407.6587v1 · doi: 10.48550/arxiv.1407.6587 · pith_short_12: XSPP3CELLIX3 · pith_short_16: XSPP3CELLIX37CVW · pith_short_8: XSPP3CEL

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/XSPP3CELLIX37CVWXWMR7DTOXY \
  | 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: bc9efd888b5a2fbf8ab6bd991f8e6ebe0ba2def7f6b3b236204f535623892e42

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "07c0931a8468e18a5c87ba555e0d16728a213c2e0e8233f993c67c212905282a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-07-24T14:10:24Z",
    "title_canon_sha256": "91ac8a15f9ff5c575ba0e80a0d73f04d2ff7096b12f352ead11a95eab178b0e4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1407.6587",
    "kind": "arxiv",
    "version": 1
  }
}