Pith Number

pith:GUHSKSL3

pith:2026:GUHSKSL3R5QFPTETWUAGGRKYAH

not attested not anchored not stored refs pending

Deformations of morphisms of coherent sheaves

Donatella Iacono, Elena Martinengo, Emma Lepri

arxiv:2605.19616 v1 · 2026-05-19 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GUHSKSL3R5QFPTETWUAGGRKYAH}

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	2026-05-20T01:05:54.435328Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

350f25497b8f6057cc93b50063455801caff5d9f5c32ea2c62d3cced41d0f59e

Aliases

arxiv: 2605.19616 · arxiv_version: 2605.19616v1 · doi: 10.48550/arxiv.2605.19616 · pith_short_12: GUHSKSL3R5QF · pith_short_16: GUHSKSL3R5QFPTET · pith_short_8: GUHSKSL3

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/GUHSKSL3R5QFPTETWUAGGRKYAH \
  | 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: 350f25497b8f6057cc93b50063455801caff5d9f5c32ea2c62d3cced41d0f59e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ed30b3b4403102e706f169ca1bbe9e0cbf7927991c063e18f9e30ef21f86cde2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2026-05-19T09:55:57Z",
    "title_canon_sha256": "55e3aa395d37092a455d5d76fc863fc3978e62a0613fc75592c2d1da1dfcda7e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.19616",
    "kind": "arxiv",
    "version": 1
  }
}