Pith Number

pith:245DCIQ7

pith:2007:245DCIQ7VMTX32O5EU6VRIADRG

not attested not anchored not stored refs pending

Deformation theory of objects in homotopy and derived categories I: general theory

Alexander I. Efimov, Dmitri O. Orlov, Valery A. Lunts

arxiv:math/0702838 v3 · 2007-02-27 · math.AG · 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{245DCIQ7VMTX32O5EU6VRIADRG}

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	2026-05-18T00:08:24.512267Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d73a31221fab277de9dd253d58a00389b68eb8f475d714600478542e89b31a51

Aliases

arxiv: math/0702838 · arxiv_version: math/0702838v3 · doi: 10.48550/arxiv.math/0702838 · pith_short_12: 245DCIQ7VMTX · pith_short_16: 245DCIQ7VMTX32O5 · pith_short_8: 245DCIQ7

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/245DCIQ7VMTX32O5EU6VRIADRG \
  | 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: d73a31221fab277de9dd253d58a00389b68eb8f475d714600478542e89b31a51

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90de906c55ab91351a5fa1acf35651e117be3a306ace024e896bee999e3b92db",
    "cross_cats_sorted": [
      "math.CT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2007-02-27T15:19:13Z",
    "title_canon_sha256": "fe7a69d8ce2afa79b470755c6bd89dfa827bf2080774cea551187889a367cd05"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0702838",
    "kind": "arxiv",
    "version": 3
  }
}