Pith Number

pith:3CL6UA3C

pith:2026:3CL6UA3CKSW3YOP6SXIGV4OEG7

not attested not anchored not stored refs pending

The Euler obstruction of a $1$-form on a determinantal singularity

Anne Fr\"uhbis-Kr\"uger, Hellen Santana

arxiv:2605.14856 v1 · 2026-05-14 · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3CL6UA3CKSW3YOP6SXIGV4OEG7}

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	2026-05-17T23:38:56.276093Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d897ea036254adbc39fe95d06af1c437f9bd75b1c0a1e8f462f67d37912f55b2

Aliases

arxiv: 2605.14856 · arxiv_version: 2605.14856v1 · doi: 10.48550/arxiv.2605.14856 · pith_short_12: 3CL6UA3CKSW3 · pith_short_16: 3CL6UA3CKSW3YOP6 · pith_short_8: 3CL6UA3C

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/3CL6UA3CKSW3YOP6SXIGV4OEG7 \
  | 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: d897ea036254adbc39fe95d06af1c437f9bd75b1c0a1e8f462f67d37912f55b2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7acd260170113e96deae3c93aeef259e3bd741de006fb23cb46a5d1e132647dc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2026-05-14T14:02:50Z",
    "title_canon_sha256": "fc4f122dcc7066100fcb3158d8051f36fd14abd516f5515ad7751a8809d9db90"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.14856",
    "kind": "arxiv",
    "version": 1
  }
}