Pith Number

pith:BRA4LTV7

pith:2010:BRA4LTV7W43QKLJWD5FXCTIZE4

not attested not anchored not stored refs pending

A note on the Bloch-Beilinson conjecture for K3 surfaces and spherical objects

Daniel Huybrechts

arxiv:1009.4371 v1 · 2010-09-22 · 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{BRA4LTV7W43QKLJWD5FXCTIZE4}

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	2026-05-18T03:13:43.868898Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0c41c5cebfb737052d361f4b714d1927151741555d56563caff60e88d5759018

Aliases

arxiv: 1009.4371 · arxiv_version: 1009.4371v1 · doi: 10.48550/arxiv.1009.4371 · pith_short_12: BRA4LTV7W43Q · pith_short_16: BRA4LTV7W43QKLJW · pith_short_8: BRA4LTV7

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/BRA4LTV7W43QKLJWD5FXCTIZE4 \
  | 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: 0c41c5cebfb737052d361f4b714d1927151741555d56563caff60e88d5759018

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "307c7c76a9e104f90e491d4252d83c4deb3698c183795cb95354bc8f6ebea23a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2010-09-22T14:33:48Z",
    "title_canon_sha256": "895fafebb8e719af2be93b8577e605cd2a44ea5bf1d17f8e1044d53df2939ade"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.4371",
    "kind": "arxiv",
    "version": 1
  }
}