Pith Number

pith:DZ4OZZS5

pith:2018:DZ4OZZS5PUGBOPYM5R2O6ZQF2E

not attested not anchored not stored refs pending

Restricting homology to hypersurfaces

Luchezar L. Avramov, Srikanth B. Iyengar

arxiv:1803.06715 v2 · 2018-03-18 · math.AC · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DZ4OZZS5PUGBOPYM5R2O6ZQF2E}

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	2026-05-18T00:16:19.170895Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e78ece65d7d0c173f0cec74ef6605d10365b75439ce9a5e255c6a4152bb7bbd

Aliases

arxiv: 1803.06715 · arxiv_version: 1803.06715v2 · doi: 10.48550/arxiv.1803.06715 · pith_short_12: DZ4OZZS5PUGB · pith_short_16: DZ4OZZS5PUGBOPYM · pith_short_8: DZ4OZZS5

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/DZ4OZZS5PUGBOPYM5R2O6ZQF2E \
  | 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: 1e78ece65d7d0c173f0cec74ef6605d10365b75439ce9a5e255c6a4152bb7bbd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6232ffe500db94b017fc7facd18ddbf193cb37d48a4d87f4baf8b7a33b37884b",
    "cross_cats_sorted": [
      "math.GR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AC",
    "submitted_at": "2018-03-18T18:58:34Z",
    "title_canon_sha256": "3dd63602c21658a84605ec70fc8f576e521f40387c44cfedd3f870891bfafc00"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1803.06715",
    "kind": "arxiv",
    "version": 2
  }
}