Pith Number

pith:6MG4GQ3J

pith:2017:6MG4GQ3JHFBEPIPQXHXDQS5XBQ

not attested not anchored not stored refs pending

Local Euler Obstruction and Chern-Mather classes of Determinantal Varieties

Xiping Zhang

arxiv:1706.02032 v1 · 2017-06-07 · 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{6MG4GQ3JHFBEPIPQXHXDQS5XBQ}

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	2026-05-18T00:31:55.825495Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f30dc34369394247a1f0b9ee384bb70c156329dcf4e5a28a955c3d11ec024c3d

Aliases

arxiv: 1706.02032 · arxiv_version: 1706.02032v1 · doi: 10.48550/arxiv.1706.02032 · pith_short_12: 6MG4GQ3JHFBE · pith_short_16: 6MG4GQ3JHFBEPIPQ · pith_short_8: 6MG4GQ3J

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/6MG4GQ3JHFBEPIPQXHXDQS5XBQ \
  | 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: f30dc34369394247a1f0b9ee384bb70c156329dcf4e5a28a955c3d11ec024c3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "844c75d15244a2823b930a2c0b91e52663cf0607c0698142b4fce13426b9e2d7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2017-06-07T02:41:11Z",
    "title_canon_sha256": "d68fbe78c7174c0648f0d29ea17bfae4d7a532f69e6d7c8247040a04cf97ac13"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.02032",
    "kind": "arxiv",
    "version": 1
  }
}