Pith Number

pith:LUBSHZNK

pith:2016:LUBSHZNKA2LZVZN3WSRHBY5KDA

not attested not anchored not stored refs pending

Smoothing cones over K3 surfaces

Stephen Coughlan, Taro Sano

arxiv:1601.02381 v3 · 2016-01-11 · 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{LUBSHZNKA2LZVZN3WSRHBY5KDA}

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	2026-05-17T23:58:23.412500Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5d0323e5aa06979ae5bbb4a270e3aa180b20560931258b58ccc1ee4c3e793d4e

Aliases

arxiv: 1601.02381 · arxiv_version: 1601.02381v3 · doi: 10.48550/arxiv.1601.02381 · pith_short_12: LUBSHZNKA2LZ · pith_short_16: LUBSHZNKA2LZVZN3 · pith_short_8: LUBSHZNK

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/LUBSHZNKA2LZVZN3WSRHBY5KDA \
  | 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: 5d0323e5aa06979ae5bbb4a270e3aa180b20560931258b58ccc1ee4c3e793d4e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f5e13cd93f6f7b44dd56340bd4e13dab4c2cc923c58528a819b42dced6ad965",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2016-01-11T10:16:14Z",
    "title_canon_sha256": "0b8c5d6cd8b67ffa103414193278c70ffcdf7d2e017c5cc6f2d589ed276d533c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1601.02381",
    "kind": "arxiv",
    "version": 3
  }
}