Pith Number

pith:YNN6DXIN

pith:2011:YNN6DXINWDH4NOUWCCIBZY45FR

not attested not anchored not stored refs pending

Derived equivalences from cohomological approximations, and mutations of $\Phi$-Yoneda algebras

Changchang Xi, Steffen Koenig, Wei Hu

arxiv:1102.2790 v1 · 2011-02-14 · math.RT · math.KT · 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{YNN6DXINWDH4NOUWCCIBZY45FR}

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	2026-05-18T04:28:46.426462Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c35be1dd0db0cfc6ba9610901ce39d2c7ad667676c828f02500b50d70cc38ffd

Aliases

arxiv: 1102.2790 · arxiv_version: 1102.2790v1 · doi: 10.48550/arxiv.1102.2790 · pith_short_12: YNN6DXINWDH4 · pith_short_16: YNN6DXINWDH4NOUW · pith_short_8: YNN6DXIN

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/YNN6DXINWDH4NOUWCCIBZY45FR \
  | 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: c35be1dd0db0cfc6ba9610901ce39d2c7ad667676c828f02500b50d70cc38ffd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5140be89b6c754968344cdd15ca1c58dc93c839c57ab7a56e81ef1efa9038f21",
    "cross_cats_sorted": [
      "math.KT",
      "math.RA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RT",
    "submitted_at": "2011-02-14T15:11:01Z",
    "title_canon_sha256": "89b7b15a5374d3794012b651b1e136b41fa3213f5b7209d729a7a95d719a3831"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.2790",
    "kind": "arxiv",
    "version": 1
  }
}