Pith Number

pith:P3FDLQNE

pith:2008:P3FDLQNEYMUG75DVFOL6DQ7CRC

not attested not anchored not stored refs pending

The hypertoric intersection cohomology ring

Nicholas J. Proudfoot, Tom Braden

arxiv:0802.0641 v3 · 2008-02-05 · math.AG · math.AT · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P3FDLQNEYMUG75DVFOL6DQ7CRC}

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	2026-05-18T02:16:01.326792Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7eca35c1a4c3286ff4752b97e1c3e288b582679fc212f86ee37b74018205a7a4

Aliases

arxiv: 0802.0641 · arxiv_version: 0802.0641v3 · doi: 10.48550/arxiv.0802.0641 · pith_short_12: P3FDLQNEYMUG · pith_short_16: P3FDLQNEYMUG75DV · pith_short_8: P3FDLQNE

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/P3FDLQNEYMUG75DVFOL6DQ7CRC \
  | 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: 7eca35c1a4c3286ff4752b97e1c3e288b582679fc212f86ee37b74018205a7a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6ce636a2ec6d1a457c23729b7963d2e833ac38527b90f31ed3c5719e630ead91",
    "cross_cats_sorted": [
      "math.AT",
      "math.SG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2008-02-05T15:36:18Z",
    "title_canon_sha256": "c52b9d3846472a88d7c5908245e6382432786bb5a3f49a61426c0317de2832ca"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.0641",
    "kind": "arxiv",
    "version": 3
  }
}