Pith Number

pith:URC4QAES

pith:2010:URC4QAEST23VKJWF2E4MKLW3V2

not attested not anchored not stored refs pending

Abelian hereditary fractionally Calabi-Yau categories

Adam-Christiaan van Roosmalen

arxiv:1008.1245 v2 · 2010-08-06 · math.CT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{URC4QAEST23VKJWF2E4MKLW3V2}

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	2026-05-18T04:38:50.298140Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a445c800929eb75526c5d138c52edbaea860e8693ac93bb1466c5ff5f055c267

Aliases

arxiv: 1008.1245 · arxiv_version: 1008.1245v2 · doi: 10.48550/arxiv.1008.1245 · pith_short_12: URC4QAEST23V · pith_short_16: URC4QAEST23VKJWF · pith_short_8: URC4QAES

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/URC4QAEST23VKJWF2E4MKLW3V2 \
  | 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: a445c800929eb75526c5d138c52edbaea860e8693ac93bb1466c5ff5f055c267

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7d059b7b76bb56220851e529f6468ff21f80e615f1085bf699a5edfbc5e42da8",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CT",
    "submitted_at": "2010-08-06T17:50:34Z",
    "title_canon_sha256": "6959b4d79d23badd51817bf38b20f14512872c5c029675b513731c9c1b8c3cac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1008.1245",
    "kind": "arxiv",
    "version": 2
  }
}