Pith Number

pith:UG5MSMNF

pith:2001:UG5MSMNFCRZ5GVYCU4SBBHLU6X

not attested not anchored not stored refs pending

Sheaf Cohomology and Free Resolutions over Exterior Algebras

David Eisenbud, Frank-Olaf Schreyer, Gunnar Floystad

arxiv:math/0104203 v2 · 2001-04-20 · math.AG · math.AC · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UG5MSMNFCRZ5GVYCU4SBBHLU6X}

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	2026-05-18T04:06:21.518415Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1bac931a51473d35702a724109d74f5d54e32150db1b6d3cb2f485ba40a0fb9

Aliases

arxiv: math/0104203 · arxiv_version: math/0104203v2 · doi: 10.48550/arxiv.math/0104203 · pith_short_12: UG5MSMNFCRZ5 · pith_short_16: UG5MSMNFCRZ5GVYC · pith_short_8: UG5MSMNF

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/UG5MSMNFCRZ5GVYCU4SBBHLU6X \
  | 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: a1bac931a51473d35702a724109d74f5d54e32150db1b6d3cb2f485ba40a0fb9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1f221805d9f6babc28e13dd24c343b1aa282d23906ad32cd2b9440145791e59d",
    "cross_cats_sorted": [
      "math.AC",
      "math.RA"
    ],
    "license": "",
    "primary_cat": "math.AG",
    "submitted_at": "2001-04-20T14:32:45Z",
    "title_canon_sha256": "daaaefaedb9f896cd7a296c6a7ee3c63765734bdf2475f7b4844a175a9696dcb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0104203",
    "kind": "arxiv",
    "version": 2
  }
}