Pith Number

pith:QBB5I3C7

pith:2017:QBB5I3C7G4QKH2STHSXQLXYOSW

not attested not anchored not stored refs pending

Cohomology of unipotent group schemes

Eric M. Friedlander

arxiv:1702.04831 v3 · 2017-02-16 · math.RT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QBB5I3C7G4QKH2STHSXQLXYOSW}

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	2026-05-17T23:40:56.315476Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8043d46c5f3720a3ea533caf05df0e95b585b4d5dfcb3664a3d6339fe0605f4b

Aliases

arxiv: 1702.04831 · arxiv_version: 1702.04831v3 · doi: 10.48550/arxiv.1702.04831 · pith_short_12: QBB5I3C7G4QK · pith_short_16: QBB5I3C7G4QKH2ST · pith_short_8: QBB5I3C7

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/QBB5I3C7G4QKH2STHSXQLXYOSW \
  | 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: 8043d46c5f3720a3ea533caf05df0e95b585b4d5dfcb3664a3d6339fe0605f4b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "28beadc7387fc356fd2a9b221ae05cfce6e6a5251c710734be8d5791263b6fb3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RT",
    "submitted_at": "2017-02-16T01:04:12Z",
    "title_canon_sha256": "f2c3bde04c843bcf01d20924937f67f2f13597eefaf9e75f5423c3e253f9518a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.04831",
    "kind": "arxiv",
    "version": 3
  }
}